Illuminations
Circumference and Areas of Circles
Middle and high schoolers listen to a scenario about a puppy and use the scenario to develop formulas in order to find the area of a circle. In this circumference instructional activity, pupils understand how to find the radius,...
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Area and Circumference of Circles
Learners view two PowerPoints and practice computing the area and circumference of circles. They must use given formulas to make their computations. The lesson includes links to both PowerPoints as well as a worksheet (with answer key).
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Calculate Area Using Pi
Geometers find the area of four circles given their circumferences. Circumference is presented in the form of "numeral (diameter) x pi"; the answer key shows solutions as "numeral (radius squared) x pi," so computation is...
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Lesson 9-3 Practice B: Composite Figures
In this composite figures worksheet, students solve 11 short answer problems. Students find the area of figures composed of various polygons. Students find the area of each figure given a sketch of the figure with various measurements...
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Word Problems that involve Circles
In this online math worksheet, students solve word problems the involve circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
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Area of Shaded Regions that involve Circles
In this online math worksheet, students determine the area of shaded regions within a circle. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching...
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Circle Problems - Radius, Diameter, Circumference and Area
In this online math instructional activity, students determine the radius, circumference, diameter and area of circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into...
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Pushing Pivots
Students calculate the area and diameter length of a circle. In this geometry lesson, students investigate the use of pivots as they review parts of a circle. They create a circle using cardboard and label all the parts.