Students construct using Cabri software. In this geometry lesson, students convert between units and apply the correct measurements to build objects. They create the room virtually and manipulate the shapes to the desired measurements.

In this math worksheet, students look for the properties related to each shape and then fill in the graphic organizer with the categories needed.

High schoolers calculate the perimeter of shapes. In this geometry lesson, students relate properties of polygons to the real world. They find length, midpoint and slope.

Students solve problems using sine and cosine. In this precalculus instructional activity, students solve word problems using sine and cosine. They identify where it is appropriate to laws of sine and cosine and where to use the...

Ninth graders calculate the distance between two points.

Students add and subtract fractions and multiply and divide fractions using pattern blocks.

Pupils build a working definition of regular fractal, look carefully at the concepts of dimension and scale, and are introduced to logarithms. They solve simple exponential equations for the exponent both by trial and error and using logs.

Students build a working definition of a regular fractal, they measure the concepts of dimensions and scale, they explore the concept of a logarithm and they attempt to solve simple exponential equations for the exponent both by trial...

Students work together to make figures out of tangram squares. In groups, they calculate the measurements they need and apply the Pythagorean Theorem. They complete a worksheet solving equations using the theorem and review their answers.

Students watch a demonstration on making a quilt. Using that information, they practice making their own lone star quilt. They share their creation with the class to end the lesson and can make more quilts with different types of...

Learners measure the circumference of an object to the nearest millimeter. They also measure the diameter. The relationship of the two measurements is taught and how the value of pi came into existence.

[Free Registration/Login may be required to access all resource tools.] Determine an alternate formula for a triangle's area.

[Free Registration/Login may be required to access all resource tools.] This lesson covers how to find the area of a triangle using sine.

In this task, 8th graders are given the dimensions of two isosceles triangles and are asked to compare their areas. They must draw them and use the Pythagorean Theorem and the triangle area formula to solve the problem. Aligns with 8.G.B.7.

Students review the definition and area formula for the rectangle, square, parallelogram, triangle, trapezoid, and circle.

Calculate the Area of a Trapezoid This Concept Handheld Software Application reviews the definition and area formula for the rectangle, square, parallelogram, triangle, trapezoid, and circle.

Explains how to use Heron's formula with external functions using computer programming. Includes detailed directions.

These activities provide an opportunity for students to explore the area formulas for triangles, trapezoids, and parallelograms.

The resource consists of area formulas and diagrams for a square, rectangle, circle, triangle, and trapezoid.

Learn how to find the area of triangles without right angles. Find the formula to use depending on the information you know about the triangle: base and height, three sides, or two sides and an angle.

Demonstrates how to calculate the area of two-dimensional shapes using formulas. Covers parallelogram, triangle, trapezoid, and circle. Includes a video modeling how to find the area of a circle and a triangle. [0:59]

How can trigonometry be used to find the area of a triangle or parallelogram? Does the triangle need to be a right triangle, and how accurate can the results possibly be? The answers to these questions are found here along with several...

In this set of worksheet activities, students will be guided to discover formulas for area of polygonal shapes and circles.

Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.