3 years ago

Given that mCD=20°, find mBC

Mathematics

1 answer:

frosja888 [35]3 years ago

5 0

Answer:

70°

Step-by-step explanation:

$m\widehat {BC} = 90\degree - m\widehat {CD}$

$m\widehat {BC} = 90\degree -20\degree$

$m\widehat {BC} = 70\degree$

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