Lesson Plan
Curated OER

Surface Area of Prisms

For Teachers 8th - 10th
Students compute surface area and volume of prisms. In this surface area lesson, students find the surface area and volume of rectangular and triangular prisms. Independently, students use their computers to determine the volume,...
Lesson Plan
Curated OER

Finding Area of Similar Figures

For Teachers 7th - 8th
Students explore the concept of finding area of similar figures. In this finding area of similar figures lesson, students use pattern blocks to construct similar figures. Students trace their construction and find the area. Students...
Lesson Plan
Curated OER

Complex Area Problems

For Teachers 9th - 11th
Students calculate the area of different polygons. In this geometry lesson, students find the area of complex polygons. They solve word problems using rates and distances.
Lesson Plan
Curated OER

Area and Perimeter of Polygons

For Teachers 10th
In this geometry worksheet, 10th graders calculate the perimeter and area using the specific formula for that polygon. There are 5 questions with an answer key.
Lesson Plan
Curated OER

Introductory to Area (Squares, Rectangles, and Triangles)

For Teachers 6th - 8th
Middle schoolers explore the concept of finding area. In this finding area lesson, students use knowledge of area of triangles to find area of squares and rectangles. Middle schoolers find area of irregular figures by breaking the...
Lesson Plan
Curated OER

Triangle in the Matrix

For Teachers 9th - 12th Standards
Young mathematicians represent a triangle with a matrix and use the determinant to find the area of three given triangles. Learners also verify the formula for area of a triangle. 
Lesson Plan
Curated OER

Triangle Explorer

For Teachers 3rd - 6th
Students compute the area of triangles in a computer program. In this measurement lesson plan, students complete 5 easy, 5 medium, and 5 hard problems.
Lesson Plan
Curated OER

The Centroid of a Triangle

For Teachers 9th - 10th
Students familiarize themselves with the construct and measure menus. They demonstrate how to use the Sketchpad Calculator. They draw a triangle and construct the centroid. They shade in each of the small triangles and measure the area.
Lesson Plan
Curated OER

Isosceles Triangle Theorem

For Teachers 8th - 9th
In this geometry worksheet, students differentiate between isosceles and regular triangles. They calculate the area and perimeter of the triangle. There are eleven questions with an answer key.
Lesson Plan
Curated OER

Parallelograms and Triangles

For Teachers 8th - 11th
In this parallelogram and triangle worksheet, learners answer 10 word problems regarding the area and perimeter of triangles and the area of parallelograms.
Lesson Plan
Curated OER

Fish Tanks: Volume and Surface Area

For Teachers 5th - 7th
Given a very realistic challenge, your young geometers design residential fish tanks in rectangular and triangular prism shapes. They compute the volume of water each will hold. They also determine the size of plastic covers for each...
Lesson Plan
Curated OER

Finding the Area of a Triangle

For Teachers 5th
Fifth graders investigate the area of a triangle. In this geometry lesson, 5th graders practice finding the area of a triangle using the correct formula: 1/2bh.
Lesson Plan
Curated OER

Area of a Triangle

For Teachers 9th - 11th
In this geometry worksheet, students solve problems by finding the area of a triangle. They are given the sides and asked to solve using the Pythagorean Theorem. There are 72 problems.
Lesson Plan
Curated OER

Connecting Area Formulas Produces a Beautiful Formula

For Teachers 11th - Higher Ed
In this math worksheet, pupils find the area of the triangle using the formula of 1/2 bh. Then they find the area using an alternative method.
Lesson Plan
Curated OER

Geography: Lengths, Perimeter, and Area of Similar Objects

For Teachers 6th
Sixth graders explore characteristics of similar objects. Using attribute blocks, they explore the ratios of the perimeter, area and side length in similar shapes. They calculate and compare the area of shapes.
Lesson Plan
Curated OER

Principles of Square Roots Lesson Plan

For Teachers 8th - 11th
Middle and high schoolers investigate all the different places in math that square root is present. In this geometry instructional activity, pupils discuss square roots as it relates to a right triangle and construction. They go over...
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 6th - 7th
In this pythagorean theorem worksheet, students identify the missing length of one side for 10 triangles. Each triangle gives the lengths of two sides and students must find the length of the third. 
Lesson Plan
Illustrative Mathematics

Painting a Barn

For Teachers 5th - 7th Standards
When painting a barn you have to calculate surface area, and that is exactly what this resource is about. Not only will your future home owners calculate the surface area, but also the cost. It is a real-life problem that every that...
Lesson Plan
Curated OER

Shapes!

For Teachers K
Explore five basic shapes- square, rectangle, triangle, circle, and stars with youngsters. They will participate in hands-on activities, draw each shape, name each shape. They also get to eat things that are in the shapes they have just...
Lesson Plan
Curated OER

Learning Unit: The Pythagorean Theorem

For Teachers 8th - 10th
Middle and high schoolers research the life of Pythagoras and the Pythagorean theorem. They write a short biography of Pythagoras and learn to apply the theorem in their study of right triangles.
Lesson Plan
Curated OER

Exploring Number and Operation in Secondary Mathematics

For Teachers 5th - 8th
Young geometers need a clear understanding of perimeter, volume, and area. This lesson provides a worksheet to help small groups of learners to calculate various measurements of objects and choose the proper units for measurement. It...
Lesson Plan
Discovery Education

Discovering Math: Exploring Geometry

For Teachers 6th - 8th Standards
Apply geometric properties and formulae for surface area and volume by constructing a three-dimensional model of a city. Learners use similar and congruent figures and transformations to create a city of at least 10 buildings. They trade...
Lesson Plan
Curated OER

Distance Formula

For Teachers 8th - 10th
Young scholars watch teacher demonstration of distance formula, view non-collinear cities on maps, plot points on coordinate plane, evaluate square roots, compute distance between two points, and use Heron's formula to find area of...
Lesson Plan
Curated OER

Altitude, Median, and Angle Bisector of a Triangle

For Teachers 9th - 12th Standards
Learners investigate the special properties of an altitude, a median, and an angle bisector and explore how these special segments divide the area of a triangle. The dynamic nature of Cabri Jr. allows pupils to form and verify conjectures.

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