Archive List for Secondary Math

Inscribed Angle Theorem: Central Angle and Arc Length

One of the areas studied in mathematics is the inscribed angle. An angle using a circle is an inscribed angle, and by using the properties of the inscribed angle, we can calculate the angle. There are properties of inscribed angles, which is called the inscribed angle theorem. If you do not understand the theorem, you […]

Pythagorean Theorem: Formulas and Calculation Methods

One of the things we learn in mathematics is the Pythagorean theorem. Even if there is a side with an unknown length, you can use the Pythagorean theorem to calculate its length. In order to understand the Pythagorean theorem, you need to have already learned about square roots. As long as you understand square roots, […]

Triangle Congruence Theorems: SSS, SAS, ASA, and AAS

The congruence condition of triangles is one of the geometry problems we learn in mathematics. We learn under what conditions two triangles can have exactly the same shape. After learning the triangle congruence theorems, we need to learn how to prove the congruence. You will be asked to prove that two triangles are congruent. Many […]