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svetlana [45]
3 years ago
8

Quadrilateral ABCD is inscribed in this circle. What is the measure of angle A? Show your work.

Mathematics
2 answers:
Vadim26 [7]3 years ago
8 0
Quadilateral inside circle follow these rules

sum of opposite angles is 180

so

B + D = 180

C + A = 180

x + 116 = 180

x = 180-116 = 64


A = 2×64 -40 = 128 -40
A = 88
Zinaida [17]3 years ago
5 0

Answer:

88°

Step-by-step explanation:

Angles B and D are supplementary, so the value of x is ...

x = 180° -116° = 64°

Then the measure of angle A is ...

(2x -40)° = (2·64 -40)° = 88°

The measure of angle A is 88°.

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