Congruent Triangles

🎬 Video Tutorial

(0:01) What are Congruent Triangles?: Triangles that have the same size and shape, meaning that they have identical side lengths and angle measures.
(0:55) Side-Side-Side (SSS) Rule: If all three sides of two triangles are equal, the triangles are congruent.
(1:28) Side-Angle-Side (SAS) Rule: Two triangles are congruent if they share two equal sides and the angle between them.
(1:54) Angle-Side-Angle (ASA) Rule: Two triangles are congruent if they share two equal angles and the side between them.
(2:24) Right-Angle-Hypotenuse-Side (RHS) Rule: For right-angled triangles, if the hypotenuse and one other side are equal, the triangles are congruent.

📂 Revision Cards

Congruent triangles criteria with examples showing two triangles with same side lengths and angle sizes. — 1) Congruent Triangles Definition

Diagram showing the criteria for identifying congruent triangles: SSS, SAS, ASA, and RHS with corresponding labelled triangles. — 2) Congruent Triangles Rules

Identifying congruent triangles using SSS (side, side, side) criteria with two triangles both having sides of 3 cm, 5 cm, and 6 cm. — 3) Congruent Triangles (Side-Side-Side)

Identifying congruent triangles using SAS (Side, Angle, Side) rule with two triangles having sides of 3 cm, 5 cm, and an included angle of 70 degrees. — 4) Congruent Triangles (Side-Angle-Side)

Identifying congruent triangles using ASA (Angle, Side, Angle) with two example triangles showing two angles and the included side as the same. — 5) Congruent Triangles (Angle-Side-Angle)

Identifying congruent triangles using RHS criteria with examples of right-angle triangles having the same hypotenuse and one identical side. — 6) Congruent Triangles (RHS)

Illustrating that two triangles are not necessarily congruent if they share two equal sides and a non-included angle. — 7) Congruent Triangles (Common Pitfall)

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