Instructional Video10:03
Cerebellum

Geometry - Proofs continued

9th - 12th
Understand and making sense of geometry: Proofs continued. This is part 3 from the series 'Geometry Program'.
Instructional Video4:52
Curated Video

Comparing and Contrasting Quadrilaterals: Similarities and Differences

K - 5th
This video provides a clear and concise guide for understanding and differentiating between types of quadrilaterals. We highlight the similarities and differences between these shapes, emphasizing the shared attributes of parallel sides...
Instructional Video4:42
Curated Video

Identifying Rhombuses: Attributes and Characteristics

K - 5th
In this video, students learn how to identify a rhombus by its attributes. The video explains that a rhombus has four congruent sides, opposite sides that are parallel, and opposite angles that are equal.
Instructional Video3:50
Curated Video

Comparing and Analyzing Triangles by their Sides

K - 5th
In this lesson, the teacher explains how to compare and analyze triangles by their sides. The lesson covers different types of triangles, including equilateral, isosceles, and scaling triangles, and how to identify them based on their...
Instructional Video4:49
Curated Video

Identifying Quadrilaterals

K - 5th
In this video, the teacher explains how to identify different types of quadrilaterals by looking at their attributes. They discuss quadrilaterals with two sets of parallel sides, such as parallelograms, rectangles, squares, 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 Video5:37
Curated OER

What is a Regular Polygon?

5th - 8th
What makes a polygon a regular polygon? Does this mean there are irregular polygons? For a polygon to be classified as a regular polygon, all the sides must be congruent and all the angles must be congruent. Those are the two rules that...
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 Video4:28
Curated OER

How Do You Find Missing Angles in an Isosceles Triangle?

6th - 8th
Finding the missing values of two angles in an isosceles triangle is not as difficult as it sounds. But how can two out of three angle's measurements be found? Well, there are special properties about an isosceles triangle which make...
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....
Instructional Video
Sophia Learning

Sophia: Notation for Congruent Parts

9th - 10th Standards
Explore the notation used to represent congruent sides and angles in a triangle. Take a quiz to assess learning.