Lesson Plan
Curated OER

Area of a Triangle

For Teachers 10th - 11th
Students solve the area of triangles. In this precalculus lesson, students are given two sides of a triangle and asked to calculate the area. They apply the law of sine and the side-angle-side area formula to solve.
Activity
Illustrative Mathematics

Same Base and Height, Variation 1

For Teachers 5th - 7th Standards
Four triangles are depicted for learners to construct on a geoboard. They compute and compare the areas, and so meet one of the sixth grade Common Core standards for geometry. Note that the set of triangles does not include a right...
Lesson Plan
Curated OER

Review of Triangles

For Teachers 8th - 10th
Young scholars investigate the Pythagorean Theorem. In this geometry lesson, students define angles and sides of right triangles. They calculate the area and surface area using formulas derived by the Pythagorean Theorem.
Lesson Plan
Curated OER

Pick's Theorem

For Teachers 9th - 11th
Students investigate polygons and their lattice. In this calculus lesson, students record data using different methods. They analyze their data and draw conclusions based on the relationship between the area and the interior lattice.
Lesson Plan
Curated OER

Geometry Review

For Teachers 7th
Seventh graders explore basic geometric definitions involving angles, area, and circumference. To reinforce basic geometric concepts, they play a "lightning Flash" card game. Students discuss chores or jobs that require the use of...
Lesson Plan
Curated OER

Forces, Loads, Materials, Shapes

For Teachers 7th - 9th
Students investigate forces, loads, materials and shapes as they relate to science. In this science lesson, students differentiate between the basic definitions required to perform a scientific experiment. They answer questions dealing...