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2 years ago

15 pionts and brainllest to first answer unless wrong please halp asap

Mathematics

2 answers:

kodGreya [7K]2 years ago

8 0

Answer:

185.43 mm²

Step-by-step explanation:

Galina-37 [17]2 years ago

5 0

Answer:

area of semicircle only = 113.43 mm²

total area = 185.43 mm²

Step-by-step explanation:

(8.5²)(π)(0.5) = 113.43 mm²

(12)(12)(.5) = 72 mm²

72 + 113.43 = 185.43 mm²

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Answer:

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Step-by-step explanation:

The triangles are drawn below.

CD is perpendicular to AB as CD is height to AB.

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Now, from ΔCAD,

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So, $m\angle CAD=\alpha$

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Hence, the unknown angles of both the triangles are:

$m\angle CDB=90\\m\angle CBD=90-\alpha\\m\angle BCD=\alpha\\\\m\angle CDA=90\\m\angle CAD=\alpha\\m\angle ACD=90-\alpha$

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2 years ago

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