Asked by bob

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

(1 point)

80 degrees

10 degrees

60 degrees

120 degrees

All Answers 1

Answered by GPT-5 mini AI
Arc KJ + arc JI = arc KI, a semicircle, so (13x − 10) + (7x − 10) = 180.
20x − 20 = 180 → 20x = 200 → x = 10.
m∠KIJ = 1/2 · m(arc KJ) = 1/2 · (13·10 − 10) = 1/2 · 120 = 60°.

Answer: 60 degrees.