This mini-lesson explores the area of a circle. Provides a definition, examples, and practice questions with answers.

Students will use proportional reasoning to develop formulas to determine the area of sectors of circles. Students will then solve problems involving the area of sectors of circles.

The student will apply the formula for the area of regular polygons to solve problems.

Explore everything about circles. Learn various parts of a circle like a diameter, radius, circumference, circles chord, tangent circles, major arc, segment, sector, and discover other interesting aspects of it. Try your hand at solving...

Given composite figures (combinations of rectangles, squares, parallelograms, trapezoids, triangles, semicircles, and quarter circles), students will be able to determine expressions for the area as well as calculate the area of the figure.

Do you need to learn about Pi, circumference, or the area of a circle or just have a quick refresher about them? This British web site will take you through the basics and offers a quick on-line test to help you check your understanding.

This site has many useful formulas and examples relating to circles, including related definitions, circumference of a circle, area of a circle, length of a circular arc, area of a circular sector, equation of a circle in cartesian...

[Free Registration/Login may be required to access all resource tools.] Find the radius or diameter of a circle given its area.

In this lesson, 7th graders will learn vocabulary associated with circles and use formulas to find the area and circumference of circles.

Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.

Get independent practice working with finding the circumference, area and radius of circles. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

Material to supplement classroom instruction on sectors and segments of circles. Find guidelines on how to find the area of sectors and segments, as well as a multiple-choice quiz, and an activity idea called "Sectors and Pizza."

A wealth of resources to supplement instruction on parts of the circle. Find lessons describing chords, tangents, secants, and segments, as well as related practice quizzes and classroom activities.

Students learn to derive the formula for the area of a circle. They learn to relate a circle to a parallelogram and rectangle while learning the concept of infinity as they imagine slicing an circle into infinitesimally small slices.

A lune of a circle is defined and a problem of finding the area of two lunes is given.

Seventh graders will compare the formula for the area of a regular polygon to discover the formula for the area of a circle.

This worksheet provides a variety of 3D geometry questions requiring higher order thinking skills. Questions include; finding the surface area of a prism, surface area of pyramid, surface area of a sphere, and platonic solids.

The arbelos is the white-shaded region between the three semicircles in the illustration at right. In this project, you'll prove an interesting method for determining the area of the arbelos.

An area problem involving finding the area of a rectangle and a circle. The problem may be made into a general proof as well.

This activity provides exercises in working with number patterns. Included are questions related to fractals, patterns in exponents, and perimeter and area.

Investigate the concepts of area, volume, 3D shapes, and nets using this interactive Learn Alberta math. The solid shapes focused on this exploration include rectangular and triangular prisms, rectangular and triangular pyramids,...

In this lesson plan, 7th graders determine the circumference and area of a circle.

In this lesson plan, 7th graders answer word problems to determine the area of a circle.

Explains formulas for areas of sectors of circles and lengths of arcs. Demonstrates how to use the formulas in each of degrees and radians.