The value of x is 6 cm after applying the hypotenuse theorem, option (D) is correct.
What is a right-angle triangle?
It is a triangle in which one of the angles is 90 degrees and the other two are sharp angles. The sides of a right-angled triangle are known as the hypotenuse, perpendicular, and base.
As we can see, the side view of a desk telephone is making a right angle triangle:
From the Pythagoras theorem:
Hypotenuse = 11 cm
The base = 9.5 cm
Perpendicular = x
11² = x² + 9.5²
x² = 11²—9.5²
x = √30.75
x = 5.54 cm ≈ 6 cm (The nearest value is 6 cm)
Thus, the value of x is 6 cm after applying the hypotenuse theorem option (D) is correct.
Learn more about the right angle triangle here:
brainly.com/question/3770177
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