Transformer_WWW 2021-3-24 18:08
請有心人幫手解答 [attach]12199769[/attach]Thankyou
top11 2021-3-25 02:07
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請有心人幫手解答 12199769Thankyou [/quote]
Let ∠COB = x
Then, reflex ∠AOB = 3x
90° + x + 3x = 360° (∠s at a point)
4x = 270°
x = ∠COB = 67.5°
reflex ∠AOB = 3x = 202.5°