I Honestly dont understand all of these that have to do with right angles, tangent lines, and secant lines. can i please get some help.

Question

asked Oct 11, 2021 127k views

1 Answer

Astrofrog · Answer 1 · 2021-10-16T15:06:46+0000

Answer:

110°

Explanation:

m arc DB=140°

m arc BCD=360-140=220°

∠ A=1/2×220=110° (∵angle at the circumference=1/2 angle at the center.)