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# Video lessons for elementary geometry topics

## Shapes: grades 1-3

## Area and perimeter: grade 3

## Area and perimeter: grade 4

## Angles: grade 4

## Polygons: grades 4-5

## Grade 5

## Grade 6

## Grade 7

### See also

This is a collection of free video lessons for elementary and middle school geometry topics (grades 1-7). Please choose a topic from the list below.

These videos match topics in Math Mammoth Early Geometry worktext (Blue Series).

Basic shapes (grade 1)

Rectangles and squares and geometric patterns (grade 2)

Some special quadrilaterals (grade 3)

These videos match topics in Math Mammoth Early Geometry worktext (Blue Series).

More about area: Area of rectangles and the distributive property

Problems to solve: area of rectangles

Area and perimeter problems — rectangular shapes

This video matches a topic in Math Mammoth Geometry 1 worktext (Blue Series).

These videos match topics in Math Mammoth Geometry 1 worktext (Blue Series).

How to use a protractor to measure & draw angles

How to draw a right angle (perpendicular line) and a rectangle

These videos match topics in Math Mammoth Geometry 1 worktext (Blue Series).

These videos match topics in Math Mammoth Geometry 1 worktext (Blue Series).

These videos match topics in Math Mammoth Geometry 2 worktext (Blue Series).

Area of parallelograms and triangles

Find the area of a triangle by drawing and measuring the altitude

These videos match the topics in Math Mammoth Geometry 2 and Math Mammoth Geometry 3 worktexts (Blue Series).

Drawing geometric shapes with given conditions

Drawing triangles with given conditions

Pi and the circumference of a circle

How to calculate the area of a circle, plus simple proof for the formula

Applications of the Pythagorean Theorem 1: area of an isosceles triangle

Applications of the Pythagorean Theorem 2: diagonal of a square

Applications of the Pythagorean Theorem 3: volume of a triangular prism

Applications of the Pythagorean Theorem 4: perimeter of a trapezoid