Math and Arithmetic

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25 Squares

* * * * *

30 squares

A 5*5 grid offers squares of sides 4, 3, 2 and 1 - as follows:

1 of 4*4

4 of 3*3

9 of 2*2

16 of 1*1

That's true.

In a right triangle, the square of one side must be the sum of the squares of the other two sides.
So it's impossible for all three sides to be equal.

2892 = 289 x 289 = 83,521

False.

The lengths of the legs of a right triangle are 15 cm and 20 cm. What is the length of the hypotenuse?

1. The ratio of the length of the side opposite a given angle to the hypotenuse is the sine of that angle.
2. The ratio of the length of the side adjacent to a given angle to the hypotenuse is the cosine of that angle.
3. The ratio of the length of the side opposite a given angle to the side adjacent to that angle is the tangent of that angle.

The shortest side

In order to find length BC the length of AC or length of the hypotenuse must be given

70

10 cm