Tags Geometry

Animals & Plants Arts & Entertainment Auto Beauty & Health Books and Literature Business Electronics Engineering & Technology Food & Drink History Hobbies Jobs & Education Law & Government Math People & Society Science Social Studies Sports Travel & Places

0

Subjects>Math>Geometry

What is the area of a semicircle when the radius is 21?

Anonymous

∙ 14y ago

Updated: 4/28/2022

The equation for area of a circle is A=pi x R x R. A semicircle is half a circle, so we calculate the area of a circle and divide by 2. The area of the circle would be approximately 1384.74. Thus the area of the semicircle would be 692.37.

Wiki User

∙ 14y ago

Still curious? Ask our experts.

Chat with our AI personalities

Devin

I've poured enough drinks to know that people don't always want advice—they just want to talk.

Chat with Devin

Vivi

Your ride-or-die bestie who's seen you through every high and low.

Chat with Vivi

Taiga

Every great hero faces trials, and you—yes, YOU—are no exception!

Chat with Taiga

Add your answer:

Earn +20 pts

Q: What is the area of a semicircle when the radius is 21?

Write your answer...

Submit

Still have questions?

imp

Continue Learning about Geometry

What is area of semicircle?

The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.

How do you calculate the radius of s semicircle?

Calculating the radius of a semicircle depends on what information about the semicircle is given.

What is the diameter of a semicircle?

In a semicircle, the diameter is the straight line. It is also equal to double the radius, and that property allows it to be used when calculating area and circumference.

What is the diameter of a semicircle with a radius of 5 ft?

Radius is = to half the diameter so.... when the radius of the semicircle is 5ft then the diameter is 10ft.

What is a semicircle?

a semicircle is half of a circle... so like a circle cut in half, in a straight line. just for some information you may also need in the future: area of a semicircle: multiply the radius by itself and then multiply that by pi (approx. 3.14). divide that by 2. perimeter (circumference) of a semicircle: pi times radius. hope that helps.

Trending Questions

How many pairs of perpendicular lines does a trapezoid have? How many degree angles are on the star david? How many acute angle does have a trapezoid? What is the approximate circumference of a circle with a radius of square root of 100 use 3.14 for pie? What 3D shape has two triangles and 3 squares? What do you call a line with 2 end points? What is inside the bent pyramid? What is the name of flat top pyramid? How much wood in a cord? What is Benoit Mandelbrot most well known for? What is the past participle of shape? What do all the angles of a kite equal? What is the average house size in Texas? What fraction of a circle is 10 degrees? How many linear feet is 550 square feet? How big is 50 square meters? Does a right triangle have three right angles? What is 12 degrees warmer than 38 degrees? What is the sum of interior angles in a 13-gon? How many square miles in 25 acre?

Resources

Top Categories

Product

Company

Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.