0
Still curious? Ask our experts.
Chat with our AI personalities
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
SteveKnowledge is a journey, you know? We'll get there.
Chat with Steve
RafaThere's no fun in playing it safe. Why not try something a little unhinged?
Chat with RafaAdd your answer:
Earn +20 ptsQ: What is the area of a circle with a radius of 21 centimeters?
Write your answer...
Submit
Still have questions?
Continue Learning about Geometry
What is the area of a circle with a radius of 21cm?
The area of a circle is calculated using the formula A = πr^2, where A is the area, π is a constant approximately equal to 3.14159, and r is the radius of the circle. Plugging in the radius of 21cm into the formula, we get A = 3.14159 x (21)^2 = 1385.44 square centimeters. Therefore, the area of a circle with a radius of 21cm is 1385.44 square centimeters.
What is the area of a circle with a radius of 21 cm?
About 1385.44cm2
What is the circumference of a circle whose radius is 21 meters?
A circle with a radius of 21 meters has a circumference of 131.95 meters.
What is pi times radius squared?
Area of a circle = pi*radius2 in square units
What is the radius of a circle with a circumference of 21 units?
The radius is 3.34 units.
Trending Questions
What is the total degree of angles in a trapezoid?
What 3d solid has 1 curved face and 2 flat circular faces of equal size?
What is the first step in constructing a congruent segment?
What does 14KT mean on a necklace?
How do you call a fifteen sided polygon?
Is a pentagon a quadrilateral?
What is another name for a rhombus?
What are the 5 line segments for a polygon?
Could ACB be similar to DCE?
What is the area of 180' x 130'?
When 15 is subtracted from the measure of an angle the result is the measure of a right angle what is the measure of the original angle?
Area of polygon?
What Swiss mathematician responsible for the use of the symbol for pi in mathematical notation?
What would the millimeter size be of a 0.15 carat diamond be?
How do you find slope intercept form when given coordinates?
How many lines of reflection symmetries does a 3D dodecahedron have?
What is the best kind of tile for a steam shower?
Which type of triangle would have angles measuring 25 degrees 15 degrees and 140 degrees?
What is the circumference of a 9ft circle?
A regular polygon is equiangular?
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.