Instructional Video4:19
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1
Curated OER

How Do You Find the Area of a Trapezoid?

7th - 9th
Trapezoids can be tricky! Break down the process of finding the area of a trapezoid with an engaging math video. Learners explore area formula and shown exactly how to plug in information, solve, and simplify. 
Instructional Video1:37
Curated OER

How to Find the Area of a Trapezoid

3rd - 5th
What a great resource! Two learners lead viewers through the process of finding the area of a trapezoid. It's a visual approach that your class is bound to remember.
Instructional Video1:37
Curated OER

How to Copy a Polygon

5th - 8th
A middle school students shows us how to accurately copy a polygon on a piece of paper. He uses a compass, ruler, and pencil in order to copy the correct angles and lines. This is a great video to engage your students at the beginning of...
Instructional Video1:11
Sesame Street

Jack Black and the Octagon

Pre-K - 1st
Jack Black describes an octagon. He finds everyday figures, like a stop sign, to describe the attributes of this shape. It is a great way to launch a discussion of geometric Math .
Instructional Video6:54
Curated OER

How Do You Find the Height of a Trapezoid if You Know the Area and Bases?

5th - 8th
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....
Instructional Video4:08
Curated OER

How Do You Find the Base of a Parallelogram if You Know the Area and Height?

6th - 10th
There are three variables in the formula for a parallelogram. Two of the values are given in this problem. Find the third value. Identify what each of the variables means. Match up the given values to the variables. Then solve for the...
Instructional Video4:38
Curated OER

How Do You Find the Area of a Parallelogram?

6th - 8th
So you are trying to tell me that a parallelogram is a rectangle in disguise? Wow! And I can use a similar formula of the area of a rectangle to find the area of a parallelogram? Wow! Ok, show me how! A=bh. So simple really.
Instructional Video6:13
Curated OER

What is the Formula for the Area of a Circle?

6th - 10th
Cut up a circle and make a parallelogram! What? No way! Yes way! Watch the instructor illustrate just how to cut up the circle and get that parallelogram to then get the formula for the area of a circle. It really works! Base,...
Instructional Video11:03
Curated OER

How Do You Classify Quadrilaterals?

3rd - 7th
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....