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2 years ago

How do you find the formula of a half circle?

2 answers:

4 0

Full circle
Circumference = 2*pi * r
Circumference = pi * d

Area = pi r * r = pi * r^2
Area = pi d^2 / 4

Half circle
Circumference = pi * r
Circumference = pi * r / 2

Area = pi r^2 / 2
Area = pi d^2/8

The answer depends on what you are looking for and what you are given. But those are the only common formulas I can think of at the moment.

Kazeer [188]2 years ago

4 0

Ok don't report me but this answer is a blank because I want the other person to have brainliest NP

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An escalator lifts people to the second floor of a building, 28 ft

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2 years ago

the strength of students in a school when increased by 8% becomes 2160. find the original strength of students in the school.

Leni [432]

Answer:

1987.2

Step-by-step explanation:

We can write a proportion to find the total amount in the choir using the information given. A proportion is two equivalent ratios set equal to each other. Since we know the strength of students increased by 8% to 2160 then the original was 92%.

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