Calculating the circumference or perimeter of a circle has gotten easier with this formula and practice for finding the circumference.

Make grocery shopping a mathematical experience. Parents and children explore a variety of math concepts through this collection of engaging math activities. Lesson are presented in varying levels of difficulty, offer "Parent Pointers"...

Great lesson plans covering a wide-range of math-related subjects.

This standards-based NCTM website offers resources for teachers of mathematics for all grade levels, including interactive math tools, lesson plans, online resources, and the like.

Explore different polygons and find their perimeter with this interactive lesson from T.V.411. Students see examples of polygons in everyday life and have immediate feedback to your responses to lesson questions.

This site includes two first grade math vocabulary lesson plans: one for measurement terms and time and money, and another for geometry terms

The CyberSquad has to deal with angles and distances to locate a treasure chest in this video segment from Cyberchase.

This geometry resource investigates types of angles. Definitions, detailed examples, and practice problems are included.

Forest industry professionals make measurements in their work using tools including the Clinometer and the Biltmore Stick. These tools are based on the concepts of similar triangles and trigonometric ratios in a right triangle. This...

Surveyors describe land parcels with distance and angle measurements, often given as compass headings. Once the boundaries of the land parcel are described, the surveyor can calculate the area of the land. This activity uses Cabri Jr....

In this activity, students use measuring tools and calculators to make half-sized drawings of themselves.

Students will work in cooperative groups to discover the relationships between arc length, central angle measure, and circumference. They will also discover the relationship between circle area, central angle measures, and sector area....

The purpose of this lesson is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find measurements of...

This activity is used to discover that the sum of the measures of the triangle angles is constant and to discover ways of proving the theorem listed in the activity.

A concise tool for assessing a variety of math concepts including measurement, algebra, number sense, and data. Assessment is scored online immediately. An excellent tool for quick assessment.

Use this activity to teach students to represent numbers in scientific notation, and use geometry to solve problems related to three-dimensional figures. Explore distance and capacity problems about planets in the solar system. The...

Identify the type of angle without measurement.

Test your knowledge of the missing angle measure.

Test your knowledge of the measurement of angles in a triangle.

Determine the missing angle measures of quadrilaterals inscribed in circles.

Use the alternate segment rule for cirlces to determine the angle measures.

Use trigonometry to determie the angle measures.

Test your knowledge of using the law of sines to determine angle measures.

Determine angle measures based upon the given information.