Khan Academy Static

Angles_in_circles

Learn how to measure angles using a circle protractor and solve word problems about angles as part of a circle.

Angle_types

Now that we know what angles are, let's dig a bit deeper and classify them and understand their properties better. Acute, obtuse, right, adjacent--all are angles that we will be become familiar with.

Angle_introduction

What is an angle and how do we label, measure and construct them? Great question. Luckily we have all your answers! To begin our journey towards understanding angles, we'll learn terms like vertex, acute, obtuse, circle arc, circumference, and protractor. These basic angle concepts will get you on the road to angle domination!

Vertical_complementary_and_supplementary_angles

Learn three types of angle pairs: vertical angles, complementary angles, and supplementary angles.

Measuring_and_drawing_angles

Learn how to measure angles using a protractor.

Angles_between_intersecting_lines

This tutorial introduces us to angles. It includes how we measure them, how angles relate to each other and properties of angles created from various types of intersecting lines. Mr. Angle is actually far more fun than you might initially presume him to be.

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