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Handout
CK-12 Foundation

Ck 12: Geometry: Perimeter and Area Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide looks at the definitions and units for perimeter, area, and circumference, and at the perimeter and area of different shapes, including regular...
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Lesson Plan
Better Lesson

Better Lesson: Area of Composite Shapes

For Teachers 6th Standards
Sixth graders take their knowledge about area of rectangles, squares and triangles and apply it to parallelograms, trapezoids, and composite shapes.
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Unit Plan
Mr. Martini's Classroom

Mr. Martini's Classroom: Area of Triangles, Trapezoids & Parallelograms

For Students 3rd - 8th Standards
Students solve for the area of rectangles, squares, triangles, trapezoids, and parallelograms.
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Unit Plan
Free Math Help

Free Math Help: Area Formulas

For Students 9th - 10th Standards
The resource consists of area formulas and diagrams for a square, rectangle, circle, triangle, and trapezoid.
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Unit Plan
Varsity Tutors

Varsity Tutors: Hotmath: Review: Area

For Students 9th - 10th Standards
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.
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Activity
Texas Instruments

Texas Instruments: Investigating Properties of Trapezoids

For Teachers 9th - 10th Standards
Students draw trapezoids and investigate their properties. They derive the area formula for a triangle from the area formula for a trapezoid. They also investigate the terms: Isosceles trapezoid and Tessellation. Numerous supplementary...
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Unknown Type
Houghton Mifflin Harcourt

Holt, Rinehart and Winston: Homework Help: Perimeter and Area of Triangles and Trapezoids

For Students 9th - 10th Standards
Get independent practice working with finding the perimeter and area of triangles and trapezoids. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
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Activity
CK-12 Foundation

Ck 12: Area and Perimeter of Trapezoids

For Students 5th - 7th Standards
[Free Registration/Login Required] Students move points on the trapezoid to get the bases and height in order to determine the area and perimeter.
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Activity
Texas Instruments

Texas Instruments: Getting Started With Area Formulas App

For Teachers 9th - 10th Standards
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.
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Activity
The Math League

The Math League: Area and Perimeter

For Students 9th - 10th Standards
This tutorial provides a brief introduction about what area is, then gives the formulas for area of a square, rectangle, parallelogram, trapezoid, triangle, and circle. Examples of each formula are provided.
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Activity
Texas Instruments

Texas Instruments: The Area of the Trapeziod

For Teachers 9th - 10th
This activity is a based on an activity I saw in Exploring Geometry with the Geometer's Sketchpad. Student will construct a trapeziod and then use rotation to create a parallelogram from the trapeziod. The follow up questions lead the...
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Study Guide
Oswego City School District

Regents Exam Prep Center: Area of Polygons and Circles

For Teachers 9th - 10th Standards
A lesson focusing on the area of polygons and the circumference of circles. Engaging, interactive practice worksheet, lesson plan, and related classroom activity complete this lesson.
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Activity
George Mason University

Area Formula Lab

For Teachers 4th - 8th Standards
In this set of worksheet activities, students will be guided to discover formulas for area of polygonal shapes and circles.
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Handout
CK-12 Foundation

Ck 12: Geometry: Triangles and Quadrilaterals Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide reviews the formulas for area and perimeter of triangles and different kinds of quadrilaterals.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area and Perimeter of Trapezoids

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find the area and perimeter of trapezoids. Students examine guided notes, review guided practice, watch instructional videos and...
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Lesson Plan
Better Lesson

Better Lesson: Finding the Area of a Trapezoid

For Students 6th Standards
Sixth graders find the area of a trapezoid by decomposing it into triangles and using the formula
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Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Area of Trapezoids

For Students 9th - 10th Standards
Investigate how changes in the base and height of a trapezoid affect its area.
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Handout
Quia

Ixl Learning: Area of Trapezoids

For Students 6th - 7th Standards
Brush up on your math skills relating to the area of trapezoids then try some practice problems to test your understanding.
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Unit Plan
Khan Academy

Khan Academy: Area of Trapezoids

For Students 5th - 7th Standards
Practice finding the areas of trapezoids. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Handout
Quia

Ixl Learning: Trapezoids

For Students 3rd - 5th Standards
Brush up on your math skills relating to trapezoids then try some practice problems to test your understanding.
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Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Figuras Geometricas en El Plano

For Students 9th - 10th Standards
Interactive activities dealing with the areas of quadrilaterals figures.
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PPT
Sophia Learning

Sophia: Trapezoid Height and Base: Lesson 4

For Students 9th - 10th Standards
This lesson will demonstrate how to solve for an unknown height or base of a trapezoid when given the area. It is 4 of 5 in the series titled "Trapezoid Height and Base."
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.g Area of a Trapezoid

For Teachers 8th Standards
Eighth graders are given various dimensions of a trapezoid and are asked to find its area. This requires them to use the Pythagorean Theorem and to decompose the trapezoid into other polygons. Aligns with 8.G.B.7.
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Activity
Analyze Math

Analyze Math: Trapezoid Problems

For Students 9th - 10th Standards
The geometry tutorial examines the area, length, and vertices of a trapezoid. Topics include Heron's formula. The activity has several examples with detailed solutions.

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