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2 years ago

The diameter of a semicircle is 2 feet. What is the semicircle's perimeter?

Mathematics

1 answer:

Mice21 [21]2 years ago

6 0

Answer:

11/7 feet

Step-by-step explanation:

the perimeter of a circle is πr²

and a semi circle is half of a circle then the formula would be 1/2 πr²

1/2×22/7×1 (it is 1 because we have divided the diameter to get radius

so we derived at 11/7

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2 years ago

Evaluate the expression

ohaa [14]

Answer:

Step-by-step explanation:

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3 years ago

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Lin solved the equation 8 (x - 3) +7= 2x (4 - 17) incorrectly.

svet-max [94.6K]

Answer:

Her final answer should have been x = 1/2.

Step-by-step explanation:

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3 years ago

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SA = 2tr2 + 2trh

julsineya [31]

Given:

Radius of the cylinder = 5 in

Height of the cylinder = 30 in.

To find:

The surface area of the cylinder.

Solution:

The surface area of the cylinder is:

$SA=2\pi r^2+2\pi rh$

Where, r is the radius and h is the height of the cylinder.

Putting $r=5,h=30,\pi=3.14$ in the above formula, we get

$SA=2(3.14)(5)^2+2(3.14)(5)(30)$

$SA=2(3.14)(25)+942$

$SA=157+942$

$SA=1099
$

Therefore, the surface area of the cylinder is 1099 square inches.

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2 years ago

What is the surface area of this triangular pyramid?

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2 years ago