Based on the exterior angle theorem, the value of x is: 52
What is the Exterior Angle Theorem of a Triangle?
The exterior angle theorem states that the exterior angle to any vertex of a triangle equal the sum of the two interior angles opposite to it.
34° and 90° are two interior angles of ΔQRS, and they are opposite to the exterior angle, x + 72°.
x + 72 = 34 + 90 (exterior angle theorem)
x + 72 = 124
x = 124 - 72
x = 52
Therefore, based on the exterior angle theorem, the value of x is: 52
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