Question

URGENT URGENT

The side lengths of different triangles are given. Which triangle is a right triangle?

Answer 1

The 3rd and 4th answers are correct

Explanation:

The square of the longest side (hypotenuse) of a right triangle must be equal to the sum of the squares of the other two sides (legs)

Let's check to see which one is correct:

1. The longest side is 20

Let's see if the equation will be correct:

`{20}^(2) = {10}^(2) + {18}^(2)`

`400≠424`

False

.

2. The longest side is 5

`{5}^(2) = ({ √(8)) }^(2) + ({ √(18)) }^(2)`

`25≠26`

False

.

3. The longest side is 29

`{29}^(2) = {21}^(2) + {20}^(2)`

`841 = 841`

True

.

4. The longest side is 3

`{3}^(2) =( { √(4) )}^(2) + ({ √(5)) }^(2)`

`9 = 9`

True