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What is the value of x?
(geometry question)

What is the value of x? (geometry question)-example-1

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Given:

The interior angles of the triangle are 44°, 3t - 45° and x - 15°

The exterior angle of the triangle is 4t - 29°

We need to determine the value of x.

Value of t:

The value of t can be determined using the exterior angle theorem.

Applying the theorem, we have;


44+3t - 45=4t-29


3t - 1=4t-29


-t - 1=-29


-t=-28


t=28

Thus, the value of t is 28.

Value of x:

The exterior angle 4t -29 and the interior angle x - 15 are linear pairs.

Since, linear pairs add up to 180°, we have;


4t-29+x-15=180

Substituting t = 28, we get;


4(28)-29+x-15=180


112-29+x-15=180


x+68=180


x=112

Thus, the value of x is 112.

User Jeff Victorino
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