A second installment in a series on circles, this production demonstrates the process of finding the area of a circle. As an introductory tool, it is effective. However, it does not explain the reasoning behind the formula because that...

Invite your learners to take a closer look at the art and mathematical function of dome buildings as designed by the ancient Romans. In the next segment of this attractive activity set, your young historians will then learn about ancient...

Bring your math class around with this task. Learners simply identify parts of a given circle, compute its radius, and estimate the circumference and area. It is a strong scaffolding exercise in preparation for applying the formulas for...

When mathematical errors happen, part of the learning is to figure out how it affects the rest of your calculations. The activity has your mathematicians solving for the area of a circular pipe and taking into consideration any errors...

The lateral surface area of a cone. Hmmm, what does that mean? Oh, it means the part you see if the cone was sitting on a flat surface, so it does not include the base. But if you want to include the base then it would be finding the...

We are used to finding the area of a circle by plugging the radius into an equation. Here, learners are required to go further to find multiple areas and calculate the difference. They must detect a pattern in order to figure out the...

All you need are a few values to find the the volume of a cone! Watch an informative math video that guides learners through the formula needed, as well as the relationship between the cone's volume and the volume of other...

What is the formula to find the volume of a cylinder? Here's the formula - volume equals base times height, and the base of a cylinder is base equals pi times radius squared. If the is a given value for radius, and a given value for...

There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...

In this geometry instructional activity, students calculate the area and circumference of 12 circles in which either the diameter or radius is shown. There are no formulas given on this page.

In this geometry worksheet, students solve 12 problems in which the area and circumference of a circle is calculated to the tenth place. No formulas are given on this page.

Line drawings of a circle, a cylinder, and a cone at the top of the page contain the formulae for area and volume of each shape. Learners complete the missing information in a chart that lists diameter, radius, height, and area and...

Given the diameter of a circle, learners are charged with finding its area. They halve the diameter, square it, and multiply by pi. Five problems provide basic practice. 

Five problems provide practice for learners to find the area of a circle given the distance of the radius. Answers on the key use pi as a variable and do not include fully computed numeric answers. To reinforce basic multiplication facts...

Sixth graders estimate surface area of a pond using a random number table.

Students discover the area of circles. In this circles lesson, students work to find the circumference and diameter of a circle. Students compare the relation of the area of a circle to a square.

In this geometry worksheet, 6th graders identify the area of the four given circles by using the given diameters. There is a space for students to show their work.

Students explore the area of a circle.  In this area of a circle lesson, students construct a circle and find the length of its' radius.  Students plot the length of the radius v. area of the circle of their circle with varying radius...

Students investigate circles.  In this middle school geometry lesson, students determine the circumference and area of circles.  Additionally, students investigate the mathematics of a target and examine the areas of the different rings...

Eighth graders find the circumference and diameter of several lids, show the relationship of the two measurements and derive the formula for finding the area of a circle. In this area of a circle lesson plan, 8th graders find...

In this area of a circle worksheet, students solve 5 fill in the blank and 2 word problems where they are given either the radius or diameter of a circle and must use the area formula to calculate the correct area. An example with the...

In this geometry worksheet, 10th graders calculate the area of circle give either the radius or the diameter. The one page interactive worksheet contains ten questions. Answers and  hints are included. 

Learners calculate the area of a circle. In this geometry instructional activity, students discuss the area and relationship of a circle to the unit circle. They derive trigonometric values using the unit circle.

Tenth graders change numbers written in standard form to scientific notation. In this scientific notation lesson, 10th graders use given diameters and distances from the sun for each planet in our solar system. After rewriting each of...