Question

Which math sentence can be used to determine if this triangle is a right triangle?

A. 20+21=29
B. 20²+21²=29²
C. 29+21=20
D. 29²+21²=20²

Answer 1

a^2 + b^2 = c^2.....a and b are the legs and c is the hypotenuse

so u would use : 20^2 + 21^2 = 29^2

Answer 2

B .
`(20)^2+(21)^2=(29)^2`

Explanation:

We are given that

Three sides of given triangle are 21, 20 and 29.

If a triangle is right triangle, the triangle satisfied the pythagorous theorem.

Pythagorous theorem:

`(hypotenuse)^2=(base)^2+(Perpendicular\;side)^2`

`(29)^2=841`

`(20)^2+(21)^2=400+441=841`

Hence ,
`(29)^2=(20)^2+(21)^2`

Answer: B .
`(20)^2+(21)^2=(29)^2`