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3 years ago

Find the missing angle

Mathematics

1 answer:

lilavasa [31]3 years ago

3 0

Answer:

180-90=90

90÷2=45

answer is 45

Step-by-step explanation:

To determine to measure of the unknown angle, be sure to use the total sum of 180°. If two angles are given, add them together and then subtract from 180°. If two angles are the same and unknown, subtract the known angle from 180° and then divide by 2.

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Solution:

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Given data:

$A=2\pi r^2+2\pi r h$

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Subtract $2\pi r^2$ on both sides of the expression.

⇒ $A-2\pi r^2=2\pi r^2+2\pi r h-2\pi r^2$

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Option C is the correct answer.

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