Areas of Polygons, Triangles, and Trapezoids
In this area worksheet, students find the area of 10 polygons including estimating the area. Students find the area of 6 triangles and trapezoids followed by 2 area word problems.
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Finding Areas of Polygons, Variation 1
An exercise in finding the area of polygons by decomposing into triangles and composing into rectangles is the focus of this resource. Make several copies of the worksheet for each participant. Ask learners to use colored pencils to...
5th - 9th Math CCSS: Designed
Evaluating Statements About Length and Area
Class members complete an assessment task by identifying whether statements about triangles and quadrilaterals are always true, sometimes true, or never true. They then participate in a sorting activity with the same objective.
9th - 12th Math CCSS: Designed
Find the Area of Polygons by Decomposing into Triangles, Rectangles, Parallelograms, and Trapezoids
Take a multi-sided figure, such as a pentagon, and break it into smaller shapes to calculate the area. The video demonstrates this idea visually by breaking figures into small pieces and calculating each area. Also included, is a review...
6 mins 5th - 7th Math CCSS: Designed
Find Perimeter and Area by Finding the Length of Sides by Comparing Coordinates
Using coordinates to draw a rectangle, help learners understand the relationship between the given order pairs used as the vertices and the length of its joining sides. This is the second video in a series of four using geometry to solve...
5 mins 5th - 7th Math CCSS: Designed
What is the Formula for the Area of a Triangle?
The teacher explains how the formula for a triangle was determined. It is related to a parallelogram. What? The formula for the area of a triangle is derived from the area of a parallelogram? Seeing is believing, so watch this video to...
5 mins 6th - 12th Math