Khan Academy Static

Area_of_trapezoids_composite_figures

Finding the area of more complex shapes like trapezoids and composite figures (shapes built from other shapes)

Area_of_triangles

Understand the formula for the area of a triangle.

Perimeter

Have you ever wondered how much fencing you need to surround a plot of land? No? Well, you should still go through this tutorial just in case. You'll learn what perimeter is and how to calculate it.

Area_of_rectangles

Transition from counting unit squares to multiplying side length to find area. Measure side lengths with a ruler to find area. Find area of rectangles by multiplying side lengths. Find a missing side length of a rectangle when given the other side length and area.

Area_and_circumference_of_circles

A circle is at the foundation of geometry, and at the foundation of a circle is a special number called Pi. This number allows us to relate the radius, diameter, and circumference of a circle.

Count_unit_squares_to_find_area

Find area of shapes by counting unit squares. Some shapes will require combining partial square units to find area. Create rectangles with a given area by covering unit squares.

Area_of_shapes_on_grids

Area problems involving triangles and quadrilaterals on grids

Area_of_parallelograms

Understand the formula for the area of a parallelogram.

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