Geometry concepts are briefly discussed at this site, including volume of a cylinder, parallelograms, circles, trapezoids, and triangles. Sample problems and applications are included for practice.

An Olympic 400 meter track is made up of two straight sides and two semi-circular curves. For this task, students are asked to examine the perimeters of the different runners' tracks and the starting places that must be assigned in order...

Students can use the data to explore the relationship between area and perimeter for rectangles and circles and they will make generalizations about the shape of the rectangle that will produce the smallest perimeter.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to calculate the circumference of a circle. Students examine guided notes, review guided practice, watch instructional videos and...

Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.

Solve two challenging problems that apply properties of tangents to find the perimeter of a circumscribing shape.

Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included. Students receive immediate feedback and have the opportunity...

Find a quick, concise explanation of circumference. The formula for finding the circumference of a circle is explained.

This site provides the formula for circumference. Links are provided.

A complete reference guide to types of triangles and triangle perimeter and area. It provides definitions and interactive animated activities that enhance further explanation.

At the end of this lesson plan about formulas, students will be able to identify and apply the correct formula for a given situation, solve for any unknown component of the formulas for perimeter, circumference, and area of regular and...

An Olympic track is made up of two straight sides and two semi-circular curves. For this task, students are asked to calculate the perimeters at two places on the first lane and to determine the span of a 400-meter lap. Aligns with G-MG.A.

Students will use a square to investigate other polygonal shapes that can be formed. Students will work with these polygons to make designs that will later constitute cooperatively designed quilts. The quilts will be made by translating,...

This CoolMath resource provides an introduction to some Precalculus formulas.

This site provides the user with a useful reference to different geometric forms, their elements, formulas, and areas. Entirely in Spanish.

This interactive resource provides an example picture of the geometric figure chosen by students to review.

Practice finding the radius and diameter of a circle using both vocabulary and visuals. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This is a very interesting site about polygons. The site begins by distinguishing between shapes whose sides intersect and polygons whose sides do not overlap. After this short introduction, you will find information regarding area and...