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svet-max [94.6K]
3 years ago
8

I need to find the value of x and the measure of the exterior angle

Mathematics
1 answer:
adell [148]3 years ago
7 0

Given:

In a right angle triangle, the measure of exterior angle is (9x+16)^\circ.

The measure of opposite interior angle is (5x-14)^\circ.

To find:

The value of x.

Solution:

Exterior angle theorem: In a triangle the measure of an exterior angle is equal to the measure of sum of two interior angles.

Using exterior angle theorem, we get

(9x+16)^\circ=90^\circ+(5x-14)^\circ

(9x+16)^\circ=(5x+76)^\circ

9x+16=5x+76

Isolate the variable x.

9x-5x=-16+76

4x=60

x=\dfrac{60}{4}

x=15

The value of x is 15. So, the measure of the exterior angle is:

(9x+16)^\circ=(9(15)+16)^\circ

(9x+16)^\circ=(135+16)^\circ

(9x+16)^\circ=151^\circ

Therefore, the value of x is 15 and the measure of the exterior angle is 151 degrees.

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