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3 years ago

Please answer this question now

Mathematics

1 answer:

MissTica3 years ago

4 0

Answer:

AB = 72°

Step-by-step explanation:

The inscribed angle ADC is half the measure of its intercepted arc, thus

56° = $\frac{1}{2}$ ( m ABC ) ← multiply both sides by 2

112° = ABC

ABC = AB + BC = AB + 40, so

AB + 40 = 112 ( subtract 40 from both sides )

AB = 72°

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(a)

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