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7. Find the value of x:

I
940
129°
А
1450
B 35°
C 86°
D
1290

7. Find the value of x: I 940 129° А 1450 B 35° C 86° D 1290-example-1

1 Answer

5 votes

Answer:

C. 129

Apply : Angles of Intersecting Chords Theorem

m∠x is half the sum of the measure of the arcs intercepted by the angle and its vertical angle.

m∠x = 1/2(54+204)

Add numbers in brackets.

m∠x = 1/2(258)

Expand brackets.

m∠x = 129

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