# Chapter 12 Similarity and Congruence

## 12.2 Geometric Proof and Congruence

The meaning of congruence is when two figures are similar to each other based on their shape and size. In this section, we learn about Geometric Proof and Congruence, congruent triangles, prove congruent triangles, SAS, SSS, ASA, RHS.

Chapter 12 Similarity and Congruence

## 12.4 More Similarity

Shapes are similar when one shape is an enlargement of the other. Corresponding angles are equal and corresponding sides are all in the same ratio. In this section, we learn about Similar triangles, similar shapes, similarity, areas of similar figures, surface area of similar objects, volume of similar objects.

Chapter 12 Similarity and Congruence

## 12.5 Similarity in 3D Solids

When a shape is enlarged by linear scale factor k, the volume of the shape is enlarged by scale factor k^3. In this section, we learn about similar figures, area, enlargement, enlargement with positive scale factor, enlargement with negative scale factor.

Chapter 12 Similarity and Congruence