[Free Registration/Login may be required to access all resource tools.] This study guide reviews the formulas for area and perimeter of triangles and different kinds of quadrilaterals.

Learn how to sine to find the area of a triangle.

This is the second version of a task asking students to find the areas of triangles that have the same base and height. This presentation is more abstract as students are not using physical models. They still determine the area of each...

Explore finding and measuring perimeter of figures.

An interesting approach to how to analyze a speech. Presents a rhetorical pentangle as well as a rhetorical triangle, where each of the vertices represents an item to analyze. There is also an outline of the different areas to examine in...

This tutorial will show you how using formulas can help you solve problems. Include formulas for various geometric shapes and steps showing how to use them.

Define's Heron's Formula and provides examples for how to use the formula to calculate the area of a triangle.