Question

The leg of a right triangle is 2 units and the hypotenuse is 5 units. What is the length, in units, of the other leg of the triangle?

Answers-
A-3
B- sqr root of 21
C-sqr root of 29
D-7

Answer 1

For this question, we have to use the Pythagorean theory since we're dealing with a right triangle.

a² + b² = c²

We're given the value of the hypotenuse and a leg, therefore we're looking for the value of the other leg.

Now let's plug in the given data into our equation.

2² + b² = 5²
4 + b² = 25
b² = 25 - 4
b² = 21
√b² = √21 = b

The correct answer is B) √21