Practice using your graphing calculator for measuring and constructing polygons and other plane figures. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under...

Explore adjacent angles with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Learn about the interior angles of a parallelogram with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

This site from the University of California deals with different applications and topics pertaining to triangles, particularly triangulation.

[Free Registration/Login Required] In this lesson students are introduced to regular polygons. Students learn how to find the drawing angle of any given polygon, exterior angle, interior angle and the sum of the angles for a regular...

Mattie and her four sisters are visiting a toy store. Can you help them find different shapes in the toy store?

Students may use this computer applet to explore angle sums of triangle, quadrilaterals, pentagons and hexagons.

Finding the third angle of a triangle becomes easier by the explanation and examples presented.

A complete reference guide to congruence including congruent triangles and polygons. It provides definitions, animation, and interactive activities that enhance further explanation.

In this lesson, students learn to classify triangles by the size of the angles and the measures of the sides. Students will use interactives to explore equilateral, isosceles, scalene, acute, obtuse, and right triangles. Included are...

Given two polygons, try to map one onto the other using angle-preserving transformations, and determine whether they are similar. Transformations are done in "intuitive mode." Students receive immediate feedback and have the opportunity...

This lesson is a unique and fun way to review perimeter, angles, and types of adjectives. Students pick an object from the classroom that will fit in a paper lunch bag. They investigate their object and fill in the attached sheet. You...

The Geometry tutorial discusses interior and exterior angles of a polygon. Sample exercises with explanations are included.

The geometry resource explores angles in a polygon. Notes, examples, and practice problems are included.

Gives a clear definition and drawing of an exterior angle of a polygon.

[Free Registration/Login Required] Explore the world of polygons. Review the different types of polygons and quadrilaterals. Practice counting angles and sides. Identify specific polygons and create your own polygons.

This lesson focuses on quadrilaterals which can fall into multiple categories based on the number of sides and the angles.

This site contains a lesson plan for high school age young scholars. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.

A guide to support parents as they work with their students with time, shapes, and fractions as equal parts of shapes.

Using this Logo Program you can experiment with different values for N in the procedure and see the changes in the results.

Learn about the interior angles of a triangle with this helpful reference tool. Provides a detailed definition and interactive activity that enhances further explanation. Includes links to related topics.

An interactive site that instructs and demonstrates how to find the fourth angle of a quadrilateral. This site also has many links to other interactive lessons.

Find missing angles and lengths in inscribed shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Learn about drawing shapes using only a compass and straight edge or ruler with out measuring any lengths or angles.