Question

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find the value of x

Explanation:

Step1: Use the property of exterior angles of a triangle

The exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles.

Step2: Calculate the value of \(x\)

In a right - angled triangle (one angle is \(90^{\circ}\)), given one non - right interior angle is \(31^{\circ}\).
By the exterior angle property \(x=90 + 31\).

$$x=121$$

Answer:

\(x = 121\)