For Number 10 it says:
The answer to that question is approximately 5.2. I got that answer by doing the following:
For Number 12, it says:
Approximately 3.2 m.
B) According to the calculator, the right answer is 3.3 m
C) Yes, the rug will fit because the area of the room is 20^2 m, therefore, it is bigger than the rug which is 11 m^2 by 9 m.
For Number 17 it says:
A) The area of the picture is 324 m^2. I got that answer by going 18 x 18.
B) The area of the board is 1296 m^2. I got that answer by multiplying 18x18's product by 4.
C) The dimensions of the board is 36 x 36. I got the answer by finding the root of 1296 on a calculator.
Here is a game that may help you with remembering the perfect square numbers:
1. The Pythagorean Relationship states that the ares areas of the two shortest sides of the right triangle, the legs, is supposed to equal the area of the longest side--the hypotenuse. The formulae for the Pythagorean Relationship is a² + b² = c². (C must always be the hypotenuse.)
2. c² = a² + b²
c² = 12² + 5²
c² = 144 cm + 25 cm
c² = 169 cm
Square root of 169 cm = 13 cm
c = 13 cm
3. c² = a² + b²11² = 8 cm² + 6cm²
(8 x) + (6 x 6) = (11 x 11)
64 + 36 = 121
100 =/ 121
No, this is not a right triangle because the hypotenuse do not equal the legs therefore the formula c² = a² + b² does not work with it.