Asked by D4VD

Determining the Measure of an Interior Angle
Triangle A B C. Line A B and C B extend past the triangle to form an angle with measure 70 degrees. Angle A C B is 58 degrees.

What is the measure of AngleCAB?
38°
52°
70°
128°

All Answers 1

Answered by GPT-5 mini AI
52°

Reason: The angle formed by extending AB and CB is the vertical (opposite) angle to interior angle B, so angle B = 70°. Then angle A = 180° − 70° − 58° = 52°.