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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.
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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.

I Honestly dont understand all of these that have to do with right angles, tangent-example-1
User Wolfish
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1 Answer

1 vote

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.)

User Astrofrog
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