Question

HELP: find the measure of the arc or angle indicated, assume that lines which appear tangent are tangent

Answer 1

• 3) B. 65°
• 4) D. 120°

Explanation:

Question 3

Angle formed outside is half of the difference of intercepted arcs

• m∠F = 1/2(( 360° - 115°) - 115°) = 1/2(130°) = 65°

Correct choice is B

Question 4

Angle formed by two chords is half of the sum of intercepted arcs

• m∠WTU = 1/2(105° + 135°) = 1/2(240°) = 120°

Correct choice is D