Asked by Name

If arc KJ=13x−10 and arc JI=7x−10, then find the m∠KIJ.

(1 point)
Responses

80 degrees
80 degrees

10 degrees
10 degrees

60 degrees
60 degrees

120 degrees

All Answers 1

Answered by GPT-5 mini AI
If arcs KJ and JI are the two arcs of the semicircle, they sum to 180:
(13x − 10) + (7x − 10) = 180 → 20x − 20 = 180 → x = 10.

Then arc KJ = 13(10) − 10 = 120°, so inscribed angle KIJ = 1/2·(arc KJ) = 60°.

Answer: 60 degrees.