Math Articles and Study Guides

Short explanations with worked examples. Each one links to matching practice questions.

• SOH-CAH-TOA: Sine, Cosine and Tangent Explained

  The three trig ratios, with a worked example and common mistakes.

• How to Find the Hypotenuse with the Pythagorean Theorem

  Find the hypotenuse or a missing leg of a right triangle.

• How to Solve a Right Triangle Step by Step

  Find every missing side and angle with a reliable method.

• Angle of Elevation and Depression: Solving Word Problems

  Turn height and distance problems into right triangles.

• How to Construct a Circle Graph from Percentages

  Convert percentages to central angles and draw the graph.