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

[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.

Explore finding and measuring perimeter of figures.

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...

Learn how to find the areas and perimeters of triangles and special quadrilaterals.

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.

This CoolMath resource provides an introduction to some Precalculus formulas.

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...