TSA: 280 m squared
Triangular Prism:
TSA: 207 cm squared
Cylinder:
TSA: 401.92 mm squared
Showing posts with label Joseph817. Show all posts
Showing posts with label Joseph817. Show all posts
Monday, March 12, 2012
Joseph's Suface Area Post
Rectangular Prism:
TSA: 280 m squared
Triangular Prism:
TSA: 207 cm squared
Cylinder:
TSA: 401.92 mm squared
TSA: 280 m squared
Triangular Prism:
TSA: 207 cm squared
Cylinder:
TSA: 401.92 mm squared
Monday, February 13, 2012
Pythagorean Relationship
1. Explain what the pythagorean relationship.
a2+b2=c2
a2+b2 = c2 because the 2 legs are smaller than the hypotenuse and for it to equal c2, you have to square a2 and b2 and square root it after to get the hypotenuse(c2).
2.c2=a2+b2
c2=122+5cm2
c2=(12x12)+(5x5)
c2=144+25
c2=169cm2
square root 169= 13cm
3.Is this a right triangle?
a2+b2=c2
82+62=112
(8x8)+(6x6)=(11x11)
64+36 does not equal 121
So It is not a right triangle.
a2+b2=c2
a2+b2 = c2 because the 2 legs are smaller than the hypotenuse and for it to equal c2, you have to square a2 and b2 and square root it after to get the hypotenuse(c2).
2.c2=a2+b2
c2=122+5cm2
c2=(12x12)+(5x5)
c2=144+25
c2=169cm2
square root 169= 13cm
3.Is this a right triangle?
a2+b2=c2
82+62=112
(8x8)+(6x6)=(11x11)
64+36 does not equal 121
So It is not a right triangle.
Sunday, February 5, 2012
TextBook Questions Page 92-93 #5, 9, 13
5.A right triangle has side lengths of 40mm, 75mm, and 85mm.
a)Sketch the triangle. Draw a square on each side of the triangle.
b)What are the areas of the three squares.
c)Write an addition statement with the areas of the three squares.
a)
b)40mm= 40x40= 1,600
75x75= 5,625
85x85= 7,225
c) 1600+5625+7226= 14,451 mm
9.Calculate the areas of the three squares
b) Is this triangle a right triangle? Explain.
4cm= 4x4=16cm
2x2= 4cm
3x3= 9cm
b) No because 2+3 cm squared has to equal 4cm squared but it does not. 9+4 does not equal 16.
13. A small triangular flower bed has a square stepping stone at each of its sides. Is the flower bed in the shape of a right triangle? Explain your reasoning.
It is not a right triangle because the 2 legs (4800cm) has to equal the hypotenuse (9800cm) if u add them up. 4800+4800=9600 cm
not 9800cm.
a)Sketch the triangle. Draw a square on each side of the triangle.
b)What are the areas of the three squares.
c)Write an addition statement with the areas of the three squares.
a)
b)40mm= 40x40= 1,600
75x75= 5,625
85x85= 7,225
c) 1600+5625+7226= 14,451 mm
9.Calculate the areas of the three squaresb) Is this triangle a right triangle? Explain.
4cm= 4x4=16cm
2x2= 4cm
3x3= 9cm
b) No because 2+3 cm squared has to equal 4cm squared but it does not. 9+4 does not equal 16.
13. A small triangular flower bed has a square stepping stone at each of its sides. Is the flower bed in the shape of a right triangle? Explain your reasoning.
It is not a right triangle because the 2 legs (4800cm) has to equal the hypotenuse (9800cm) if u add them up. 4800+4800=9600 cm
not 9800cm.
Sunday, January 22, 2012
Joseph's Textbook Questions
10.Kai uses an entire can of paint on a square backdrop for the school play. The label on the can states that one can covers 27m squared of wall surface. Estimate the backdrop's side length, to on
e decimal place.
e decimal place. Answer: 5.1
13. Stella is planning an outdoor wedding. She would like a square dance floor with an area of 115m squared.
a)Determine the side length of the dance floor, to the nearest tenth of a metre
b) Stella finds our that the dance floor will be made up of floorboards that each measure 1cm squared. What are the 2 side lengths the dance floor can have that are closest to what she wants?
c)Which area will Stella choose?Explain
b)
c)121 is closer because it is much closer to 115m squared.
16. A fitness centre will install a square hot tub in a 6m x 6m room. They want the tub to fill no more than 75% of the room's area.
a)What is the maximum area of the hot tub?
b) What dimensions, to a tenth of a metre will the fitness centre order from the manufacturer?Explain
a) 
27
b)5.1
If u square root 27 you will get 5.1
Wednesday, November 30, 2011
Joseph's Percent Post 6,10, 14
What is the percent of each number?
Give your answer to the nearest hundredth.
6a)
Answer- 3.25%
6b)
Answer- 150.8%
6c)250% of $76.50.
Answer- 191.25%
10. When water freezes, its volume increases by approximately 10%
a) By how much does the volume of 750mL of water increase when it freezes?75
b) What is the volume of ice created? 825mL
b)
14.4% of 100 is the same as 8% of what number? Explain how you arrived at your answer.
Answer- 8% of 200 is the same as 4% of 100 because 8% is just 4% doubled.
Give your answer to the nearest hundredth.
6a)
Answer- 3.25%
6b)
Answer- 150.8%
6c)250% of $76.50.
Answer- 191.25%
10. When water freezes, its volume increases by approximately 10%
a) By how much does the volume of 750mL of water increase when it freezes?75
b) What is the volume of ice created? 825mL
b)
14.4% of 100 is the same as 8% of what number? Explain how you arrived at your answer.
Answer- 8% of 200 is the same as 4% of 100 because 8% is just 4% doubled.
Sunday, November 13, 2011
Joseph's Graphing Post
Bar Graph
Advantage- Good for seeing which set of data is better
Disadvantage- You can't see the changes overtime
Double Bar Graph
Advantage- See both sets of data and you can easily compare them
Disadvantage- Not that accurate, it won't be in the exact place
Line Graph
Advantage- You can see the changes overtime
Disadvantage- It's not that accurate to see how many people likes it
Circle Graph
Advantage- It easily compares wholes of 2 data
Disadvantage- Hard to figure out the percent if there are more than 2 data
Pictograph
Advantage- It is good to compare data and can be counted easily
Disadvantage- Sometimes the symbol is half or not a whole so it is hard to tell what it's worth
First way to misinterpret a graph is a break in the y-axis
Second way to misinterpret a graph is make on bar larger than the others
Third way to misinterpret is in a pictograph you can make one picture larger than the others
2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.
Answer
2a)The 2 graphs that would show the information more accurately is a line graph and bar graph
2b)Yes because each week they are selling more items
4. Below you see 2 different examples of graphs showing healthy choices sold at the canteen. If you had to convince Mrs Mota that we should continue selling healthy choices which graph would you choose?
4a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.
Answers
4) I would choose the line graph because it shows the changes and how it improved each month
4a)
Advantage- Good for seeing which set of data is better
Disadvantage- You can't see the changes overtime
Double Bar Graph
Advantage- See both sets of data and you can easily compare them
Disadvantage- Not that accurate, it won't be in the exact place
Line Graph
Advantage- You can see the changes overtime
Disadvantage- It's not that accurate to see how many people likes it
Circle Graph
Advantage- It easily compares wholes of 2 data
Disadvantage- Hard to figure out the percent if there are more than 2 data
Pictograph
Advantage- It is good to compare data and can be counted easily
Disadvantage- Sometimes the symbol is half or not a whole so it is hard to tell what it's worth
First way to misinterpret a graph is a break in the y-axis
Second way to misinterpret a graph is make on bar larger than the others
Third way to misinterpret is in a pictograph you can make one picture larger than the others
2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.
Answer
2a)The 2 graphs that would show the information more accurately is a line graph and bar graph
2b)Yes because each week they are selling more items
4. Below you see 2 different examples of graphs showing healthy choices sold at the canteen. If you had to convince Mrs Mota that we should continue selling healthy choices which graph would you choose?
4a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.
Answers
4) I would choose the line graph because it shows the changes and how it improved each month
4a)
Wednesday, October 12, 2011
Joseph's Proportion Post.
Ratio:A ratio is a comparison of two numbers
Rate: A comparison of two quantities measured in different units
Proportion: A proportion is an equation which states that two ratios are equal
As a playgroup worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.
3.What are the three ways you can prove that equivalent ratio statements are true?
3/4 = 12/16 or 4/9 = 16/32
4.Here is a proportion video to help
5.http://www.concurringopinions.com/wp-content/uploads/2011/10/CrimeInAmerica2.jpg
1.Does this seem fair? No because the homeless man only stole $100 and he went to jail for 15 years. And the other guy got sentenced for 40 months only even though he fraud for $3 billion.
2.It is not fair because the rich guy stole more money but he was only sentenced to jail for 40 months and the homeless man only stole $100 and he was sentenced to jail for 15 years. It should be the opposite, the rich guy should spend more then 15 years in jail.
3. What would you have done if you were the judge? I would have sentenced the rich guy in jail for 30 years or more and I would have only sentenced the homeless man for at least a year.
Rate: A comparison of two quantities measured in different units
Proportion: A proportion is an equation which states that two ratios are equal
- 5 hours to travel 360 miles is about _____mph ( 72 mph )
3.What are the three ways you can prove that equivalent ratio statements are true?
3/4 = 12/16 or 4/9 = 16/32
4.Here is a proportion video to help
5.http://www.concurringopinions.com/wp-content/uploads/2011/10/CrimeInAmerica2.jpg
1.Does this seem fair? No because the homeless man only stole $100 and he went to jail for 15 years. And the other guy got sentenced for 40 months only even though he fraud for $3 billion.
2.It is not fair because the rich guy stole more money but he was only sentenced to jail for 40 months and the homeless man only stole $100 and he was sentenced to jail for 15 years. It should be the opposite, the rich guy should spend more then 15 years in jail.
3. What would you have done if you were the judge? I would have sentenced the rich guy in jail for 30 years or more and I would have only sentenced the homeless man for at least a year.
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