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Area of Triangles and Parallelograms
In this area instructional activity, students find the area of 21 triangles and parallelograms. Students find the area of each triangle and parallelogram given a sketch and measurements of the figure.
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Area of Common Geometric Figures
Scholars can use area formulas, but can they apply what they know about area? The lesson challenges learners to think logically while practicing finding area of shapes such as rectangles, circles, parallelograms, triangles, and other...
8th - 11th Math CCSS: Adaptable
The Volume of Prisms and Cylinders and Cavalieri’s Principle
Young mathematicians examine area of different figures with the same cross-sectional lengths and work up to volumes of 3D figures with the same cross-sectional areas. The instruction and the exercises stress that the two figures do not...
9th - 10th 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
Woodworkers and Finishers: Working with Area
Connecting math to furniture building comes in handy when the dimensions change and the cost of each piece needs to reflect the higher cost. Starting with a drawing of given quadrilaterals, learners calculate the original area and then...
7th - 9th 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