Khan Academy Static

Lines

Learn what lines, line segments, and rays are and how to use them.

Angles

In this topic, we will learn what an angle is and how to label, measure and construct them. We will also explore special types of angles.

Area_and_perimeter

Area and perimeter help us measure the size of 2D shapes. We’ll start with the area and perimeter of rectangles. From there, we’ll tackle trickier shapes, such as triangles and circles.

Pythagorean_theorem

The Pythagorean theorem describes a special relationship between the sides of a right triangle. Even the ancients knew of this relationship. In this topic, we’ll figure out how to use the Pythagorean theorem and prove why it works.

Transformations_congruence_and_similarity

Learn about geometric transformations and how they're used to understand the meaning of "similar" and "congruent".

Coordinate_plane

We use coordinates to describe where something is. In geometry, coordinates say where points are on a grid we call the "coordinate plane".

Volume_and_surface_area

Volume and surface area help us measure the size of 3D objects. We’ll start with the volume and surface area of rectangular prisms. From there, we’ll tackle trickier objects, such as cones and spheres.

Shapes

Classify shapes and solve problems using what we know of the properties of shapes.

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