Question

Lengths

Find the value of x in the triangle shown below.
Choose 1 answer:
x = 6
® X = 13
X = V 65

Answer 1

C

Explanation:

using Pythagoras' identity in the right triangle

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 4² = 9²

x² + 16 = 81 ( subtract 16 from both sides )

x² = 65 ( take square root of both sides )

x =
`√(65)`