Answer:
98
Explanation:
You want the measure of exterior angle x°, given that remote interior angles are 53° and 45°.
Exterior angle
The measure of the exterior angle x° is the sum of the remote interior angles:
x° = 53° +45° = 98°
x = 98
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Additional comment
The third angle in the triangle sums with the other two to make 180°. It also sums with x° to make 180° (a linear angle). Hence the value of x° must be equal to the sum of the angles marked.
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