Extend young mathematicians' understanding of area with a geometry lesson on trapezoids. Building on their prior knowledge of rectangles and triangles, students learn how to calculate the area of trapezoids and other...

Young mathematicians build an understanding of area and perimeter with their own two hands in a series of interactive geometry lessons. Through the use of different math manipulatives, children investigate the properties of...

Take a similar approach to three dimensions. Pupils develop the relationship between areas of similar objects and see how they relate to the ratio of the sides. Building upon area formulas, small groups put together volume formulas for...

Build a complete house in just a few days. Learners create floor, roof, deck, and landscape plans for a two-story house. Scholars then use their knowledge of area formulas, trigonometric ratios, and the Pythagorean Theorem to determine...

All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....

Circles are the foundation of many geometric concepts and extensions - a point that is thoroughly driven home in this extensive unit. Fundamental properties of circles are investigated (including sector area, angle measure, and...

This unit on connecting algebra and geometry covers a number of topics including worksheets on the distance formula, finding the perimeter and area of polynomials, the slope formula, parallel and perpendicular lines, parallelograms,...

Your learners combine their knowledge of real and imaginary numbers and matrices in an activity containing thirty lessons, two assessments (mid-module and end module), and their corresponding rubrics. Centered on complex numbers and...

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

[Free Registration/Login may be required to access all resource tools.] In this lesson students use formulas and given information to figure out the dimensions and the area of different triangles. Students examine guided notes, review...

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

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

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

Students solve for the area of rectangles, squares, triangles, trapezoids, and parallelograms.

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...

Find a quick, concise explanation of area and the formulas for different shapes. An example is given to help you understand how find the area of a shape. The area formulas are listed for different types of shapes.

The geometry resource investigates the area of polygons, triangles, circles, and squares. Formulas, examples, and practice exercises are included.

Explore and learn about the features and properties of a right triangle in this lesson. Includes examples and practice questions.

[Free Registration/Login may be required to access all resource tools.] Find the area of a triangle when all three sides are known.

[Free Registration/Login may be required to access all resource tools.] This lesson covers Heron's Formula and problem solving using trigonometry.

[Free Registration/Login may be required to access all resource tools.] An alternate formula for the area of a triangle.

The geometry resource investigates the area of polygons, triangles, circles, and squares. Formulas and examples are included.

This site provides the user with a useful reference to different geometric forms, their elements, formulas, and areas. Entirely in Spanish.