Question

http://prntscr.com/96c640

Answer 1

@Directrix

Answer 2

Converse of Pythagorean Theorem:

Pythagorean Thereom converse: If the square of one side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle.

Answer 3

We have to test options.

The second option 9, 9, 9 can be immediately eliminated because those are sides of an equilateral triangle. An equilateral triangle is equiangular with 3 angles of 60 degrees. No right angle.

Answer 4

I'll test the first option and you can do the next.

5, 12, 13.

13^2 = 169

12^2 =144

5^2 = 25

Question: Does 169 = 144 + 25 ?
Yes.

Option A is made of sides of a right triangle.

Answer 5

@Diana.xL

21.5^2 =

17.5^2 =

16.5^2 =

Square those and see if the first square = the sum of the other two squares.

Answer 6

the third option is wrong. im gonna check the fourth one now.

Answer 7

I checked the fourth option and it is not correct.

Answer 8

the first option is my answer yea?

Answer 9

Yes. Option A is the only one that works out to be sides of a right tringle.

Answer 10

thnx

Answer 11

You are welcome.