Exploring Triangle Congruence Postulates

The video explores various postulates and theorems related to triangle congruency and similarity. It begins with the side-side-side (SSS) postulate, confirming congruency when all sides are equal. The angle-angle-angle (AAA) scenario is discussed, showing it implies similarity, not congruency. The side-angle-side (SAS) and angle-side-angle (ASA) postulates are explained as valid for proving congruency. The angle-angle-side (AAS) is also shown to imply congruency. Finally, the side-side-angle (SSA) scenario is examined, demonstrating it does not guarantee congruency or similarity.

What does the Side-Side-Side (SSS) postulate state about triangles?

• Two angles and one side are equal.

• One angle and two sides are equal.

• All corresponding sides are equal.

• All corresponding angles are equal.

Which of the following does NOT imply triangle congruency?

• Side-Side-Side (SSS)

• Side-Angle-Side (SAS)

• Angle-Side-Angle (ASA)

• Angle-Angle-Angle (AAA)

Tags

CCSS.HSG.SRT.B.5

What does the Angle-Angle-Angle (AAA) property imply about triangles?

• They are congruent.

• They have the same area.

• They have the same perimeter.

• They are similar.

Tags

CCSS.HSG.SRT.B.5

Why can't AAA be used to prove triangle congruency?

• Because it only applies to isosceles triangles.

• Because it only applies to right triangles.

• Because it only shows that the triangles have the same size, not the same shape.

• Because it only shows that the triangles have the same shape, not the same size.

Tags

CCSS.HSG.SRT.B.5

What does the Side-Angle-Side (SAS) postulate state?

• All three angles are equal.

• All three sides are equal.

• Two angles and the included side are equal.

• Two sides and the included angle are equal.

In the SAS postulate, why is the angle between the two sides important?

• It determines the length of the third side.

• It determines the type of triangle.

• It determines the area of the triangle.

• It determines the perimeter of the triangle.

What does the Angle-Side-Angle (ASA) postulate state?

• Two angles and the included side are equal.

• All three angles are equal.

• Two sides and the included angle are equal.

• All three sides are equal.

Tags

CCSS.HSG.CO.C.9

Why does the ASA postulate imply triangle congruency?

• Because all three sides are equal.

• Because the two sides and the included angle uniquely determine the triangle.

• Because the two angles and the included side uniquely determine the triangle.

• Because all three angles are equal.

Tags

CCSS.HSG.SRT.B.5

What does the Angle-Angle-Side (AAS) postulate state?

• All three sides are equal.

• All three angles are equal.

• Two angles and a non-included side are equal.

• Two sides and a non-included angle are equal.

Why does the Side-Side-Angle (SSA) not necessarily imply congruency?

• Because it can result in two different triangles.

• Because it only applies to right triangles.

• Because it only applies to isosceles triangles.

• Because it only shows that the triangles have the same shape, not the same size.

Tags

CCSS.8.G.A.2