3 years ago

Find the measure of the arc or angle indicated assume that lines which appear tangent are tangent

Mathematics

1 answer:

REY [17]3 years ago

6 0

Answer:

17. C 60°

18. D 121°

Step-by-step explanation:

The external angle is half the difference of the intercepted arcs.

17. (161° -41°)/2 = 60°

18. (? -59°)/2 = 31°

? = 59° +2(31°) = 121°

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