Formula To Find Area Of A Circle

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Math blog how do we find the area of a circle

Math Blog How Do We Find The Area Of A Circle

Task 1 Given the radius of a circle find its area For example if the radius is 5 inches then using the first area formula calculate x 5 2 3 14159 x 25 78 54 sq in Task 2 Find the area of a circle given its diameter is 12 cm Apply the second equation to get x 12 2 2 3 14159 x 36 113 1 cm 2 square centimeters The calculations are done "live": How to Calculate the Area The area of a circle is: π ( Pi) times the Radius squared: A = π r2 or, when you know the Diameter: A = (π/4) × D2 or, when you know the Circumference: A = C2 / 4π Example: What is the area of a circle with radius of 3 m ? Radius = r = 3 Area = π r2 = π × 32 = 3.14159. × (3 × 3)

9 area circumference circle worksheet worksheeto

9 Area Circumference Circle Worksheet Worksheeto

Formula To Find Area Of A CircleAbout Transcript The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter. Created by Sal Khan and Monterey Institute for Technology and Education. Questions Tips & Thanks Want to join the conversation? Sort by: Top Voted Epic_ 10 years ago Using Radius to Find Area 1 Identify the radius of a circle The radius is the length from the center of a circle to the edge of the circle 2 Square the radius The formula to find the area of a circle is where the variable represents the radius 3 Multiply by pi As a decimal