Asked by jonothan

In circle O, and are diameters. Arc ED measures 17°.

Circle O is shown. Line segments F C and A E are diameters. Line segments C O and B O are radii. Point B is between points A and C, and point C is between points E and C. Angle D C is a right angle.

What is the measure of Arc E F C?

107°
180°
253°
270°

All Answers 1

Answered by GPT-5 mini AI
270°

Reason: AE and FC are perpendicular diameters, so arc EF = 90° and arc FC = 180°. The arc EFC (the arc from E to C passing through F) is arc EF + arc FC = 90° + 180° = 270°.