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This is the formula for the area of a circle with a 3cm radius. The answer should be in centimeters. Happy Pi Day!...

From 4MadScientists

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From Terra Hale

A circle is at the foundation of geometry and how its parts relate to each other is both completely logical and a wonder. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/basic-geometry/circum_area_ci...

From Khan Academy

This geometry video tutorial explains how to calculate the area of the shaded region of circles, rectangles, triangles, and squares. The first example explains how to calculate the area of the shaded region of a square inside of a rectangle. The second ...

This tutorial shows how to find the area of a circle, given a diameter or a radius of a circle. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm...

From Learn Math Tutorials

How To Find The Area And Perimeter Of Semi Circle? Let's learn the same with some solved examples. For More Information & Videos visit http://WeTeachAcademy.com...

I go through two examples, one given the radius, and another given the diameter...

From rtlerman

Corbettmaths - This video explains how to find the perimeter of a semi-circle....

From corbettmaths

A how to video on How To Determine The Diameter Of A Circle that will improve your math skills. Learn how to get good at math from Videojug's hand-picked professionals. Subscribe! http://www.youtube.com/subscription_center?add_user=videojugeducation C...

From Two-Point-Four

Like my video? Visit http://www.MathHelp.com and let's do the complete lesson! In this lesson, students learn that the circumference of a circle is the distance around the circle, and the formula for the circumference of a circle is 2 times pi times the ...

From MathHelp.com

How to do the difficult questions of Area of circle or perimeter of the circle questions....

From space2727

Visit www.mathswrap.co.uk for more great resources....

From Simon Deacon