Instructional Video5:27
Curated OER

What is a Trapezoid?

5th - 8th
There are many types of parallelograms, each having specific properties. A trapezoid is a special type of quadrilateral in that it has one pair, and only one pair, of parallel lines. Take a look at some of the other quadrilaterals and...
Instructional Video5:15
Curated OER

What is a Rhombus?

5th - 8th
A closed figure with four sides means it's a quadrilateral. Each of the different types of quadrilaterals have special properties. The instructor in this video explains the special properties of a rhombus. Parallel sides and congruent...
Instructional Video5:56
Curated OER

What is a Rectangle?

4th - 7th
What are the characteristics and properties of a quadrilateral that make it a rectangle? Four sides? Right angles? Parallel sides? Watch this video and follow along as the instructor explains the terms and properties that make a...
Instructional Video7:17
Curated OER

What is a Parallelogram?

6th - 8th
A rectangle, a rhombus, a square, a trapezoid - are any of these a parallelogram? What are the criteria that make a shape a parallelogram? It has something to do with parallel sides, congruent sides, and congruent angles. Help your young...
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....