Curated OER
What is the Formula for the Area of a Trapezoid?
Make a parallelogram out of two trapezoids to find the area of one trapezoid? Sounds pretty complicated. Well, it's not complicated but there are a lot of steps. The instructor does a pretty good job of diagramming and explaining just...
Curated OER
How Do You Find the Height of a Trapezoid if You Know the Area and Bases?
Find the height of a trapezoid given the values of the two bases and the area. First write out the formula for the area of a trapezoid. Then identify all the variables and match up the given values. Now plug the values into the formula....
Curated OER
What is a Quadrilateral?
What's so special about quadrilaterals? There are five special types, yes, five. Can you name them? The instructor in this video diagrams and illustrates the special types of quadrilaterals and explains what makes each one special.
Curated OER
How Do You Classify Quadrilaterals?
A rectangle, a rhombus, a square, a trapezoid, and a parallelogram, are these quadrilaterals? What are the criteria that make and shape a quadrilateral? It has something to do with parallel sides, congruent sides, and congruent angles....
Sophia Learning
Sophia: Area of a Trapezoid
This video lesson demonstrates how to solve for the area of a trapezoid. The tutorial includes detailed examples. Students can check their understanding with an assessment.
CK-12 Foundation
Ck 12: Elem Math: Overview of Quadrilaterals
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of various quadrilaterals.
Sophia Learning
Sophia: Median Line of a Trapezoid: Lesson 2
This lesson will help you name the line segment whose endpoints are the midpoints of the the legs (non-parallel sides) on a trapezoid. It is 2 of 5 in the series titled "Median Line of a Trapezoid."
Sophia Learning
Sophia: Trapezoid: Lesson 4
This lesson explains the definition, components, and notations involved in a trapezoid. It is 4 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Trapezoid: Lesson 7
This lesson explains the definition, components, and notations involved in a trapezoid. It is 7 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Coordinate Geometry of Trapezoids: Lesson 2
This lesson [7:20] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a trapezoid in a coordinate plane. It is 2 of 4 in the series titled...
Sophia Learning
Sophia: Coordinate Geometry of Trapezoids: Lesson 4
This lesson [15:33] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices of a quadrilateral, if the shape is a trapezoid. It is 4 of 4 in the series titled "Coordinate...
Sophia Learning
Sophia: Coordinate Geometry of Trapezoids: Lesson 1
This lesson [5:14] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a trapezoid in a coordinate plane. It is 1 of 4 in the series titled...
Sophia Learning
Sophia: Trapezoid: Lesson 6
This lesson explains the definition, components, and notations involved in a trapezoid. It is 6 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Median Line of a Trapezoid: Lesson 5
This lesson will help you name the line segment whose endpoints are the midpoints of the the legs (non-parallel sides) on a trapezoid. It is 5 of 5 in the series titled "Median Line of a Trapezoid."