Congruence and Similarity IAB Review

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What is congruence in geometry?

Back

Congruence means that two figures have the same shape and size. If two angles or sides are congruent, they are equal in measure.

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What is similarity in geometry?

Back

Similarity means that two figures have the same shape but not necessarily the same size. Their corresponding angles are equal, and their corresponding sides are in proportion.

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What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

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What are congruent angles?

Back

Congruent angles are angles that have the same measure.

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What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way, such as translation, rotation, reflection, or dilation.

Front

What is a translation?

Back

A translation is a transformation that moves every point of a shape the same distance in the same direction.

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What is a reflection?

Back

A reflection is a transformation that flips a shape over a line, creating a mirror image.

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What is a rotation?

Back

A rotation is a transformation that turns a shape around a fixed point at a certain angle.

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What is dilation in geometry?

Back

Dilation is a transformation that changes the size of a shape but keeps its proportions the same.

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How can you prove two triangles are congruent?

Back

Two triangles can be proven congruent using criteria such as SSS (Side-Side-Side), SAS (Side-Angle-Side), ASA (Angle-Side-Angle), AAS (Angle-Angle-Side), or HL (Hypotenuse-Leg for right triangles).