3 years ago

What is the measure of ABC?

Mathematics

1 answer:

jeka943 years ago

8 0

Answer:

Step-by-step explanation:

∠ABD = 0.5( arc AD + arc EC) = 0.5(131 + 53) = 0.5 × 184 = 92°

∠ABD and ∠ABC form a straight angle, thus

92 + ∠ABC = 180 ( subtract 92 from both sides )

∠ABC = 88° → D

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