CK-12 Foundation
Ck 12: Geometry: Trapezoids and Kites Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide looks at properties and theorems about trapezoids and kites.
CK-12 Foundation
Ck 12: Geometry: Area and Perimeter of Trapezoids
[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...
Better Lesson
Better Lesson: Finding the Area of a Trapezoid
Sixth graders find the area of a trapezoid by decomposing it into triangles and using the formula
National Council of Teachers of Mathematics
Nctm: Illuminations: Area of Trapezoids
Investigate how changes in the base and height of a trapezoid affect its area.
Quia
Ixl Learning: Trapezoids
Brush up on your math skills relating to trapezoids then try some practice problems to test your understanding.
Quia
Ixl Learning: Area of Trapezoids
Brush up on your math skills relating to the area of trapezoids then try some practice problems to test your understanding.
Sophia Learning
Sophia: Coordinate Geometry of Isosceles Trapezoids: Lesson 3
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is an isosceles trapezoid in a coordinate plane. It is 3 of 5 in the series titled...
Analyze Math
Analyze Math: Trapezoid Problems
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.
Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help: Perimeter and Area of Triangles and Trapezoids
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.
Illustrative Mathematics
Illustrative Mathematics: 8.g Area of a Trapezoid
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.
Khan Academy
Khan Academy: Area of Trapezoids
Practice finding the areas of trapezoids. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Area and Perimeter of Trapezoids
[Free Registration/Login Required] Students move points on the trapezoid to get the bases and height in order to determine the area and perimeter.
Illustrative Mathematics
Illustrative Mathematics: 5.g What Is a Trapezoid? (Part 2)
The purpose of this task is for students to compare different definitions for trapezoids. Aligns with 5.G.B.4.
Illustrative Mathematics
Illustrative Mathematics: 4.g What Is a Trapezoid? (Part 1)
The purpose of this task is for students to articulate a definition for a trapezoid. Aligns with 4.G.A.2.
Math Open Reference
Math Open Reference: Median of a Trapezoid
Learn about the median of a trapezoid with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Math Open Reference
Math Open Reference: Area of a Trapezoid
Learn about the area of a trapezoid with this helpful reference tool. Provides a detailed definition, examples, and interactive activities that enhance further explanation. Includes links to related topics.
University of Cambridge
University of Cambridge: Nrich: Count the Trapeziums (Trapezoids)
The challenge at this one page website, is to see how many trapezoids (British-trapeziums) you can find in the figure. When you have your results, you can easily check it right at the website.
Interactive Mathematics
Interactive Mathematics: Trapezoidal Rule
Using trapezoids, the area under a curve can be determined. The Trapezoid rule is demonstrated to show exactly how that can be accomplished.
Sophia Learning
Sophia: Trapezoid Height and Base: Lesson 4
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."
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Trapezoid
Find a quick, concise explanation of what a trapezoid is. Examples are given and clearly explained.
Free Math Help
Free Math Help: Trapezoids
The lesson discusses trapezoids. The resource consists of an explanation, diagrams, and practice problems with solutions.
Science Struck
Science Struck: Finding the Volume of a Trapezoidal Prism
Explains how to calculate the volume of a trapezoidal prism and models how to solve example problems.
Wolfram Research
Wolfram Math World: Trapezoidal Rule
This site from MathWorld.com give a formula for a two point trapezoidal approximation for the area under a curve.
Mr. Martini's Classroom
Mr. Martini's Classroom: Area of Triangles, Trapezoids & Parallelograms
Students solve for the area of rectangles, squares, triangles, trapezoids, and parallelograms.
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