Similarity

10

Solve for x

3

Solve for x

5

Solve for x

7

Solve for x

9

Solve for x

AA

State the reason the triangles are similar

SAS

State the reason the triangles are similar

Dilation

A transformation that enlarges or reduces in size

18

Solve for SH

Ratio

A comparison of two numbers

Proportion

Equal Ratios

Similar Figures

Figures that have the same shape but a different size; the angles are congruent and the sides are proportionsal

SAS Similarity Postulate

If 2 corresponding sides of two triangles are proportional, and the angle between the sides are congruent, the two triangles are similar.

SSS Similarity Postulate

If all 3 corresponding sides two triangles are proportional, the two triangles are congruent

AA Similarity Postulate

If two angles one one triangle are congruent to corresponding angles in a second triangle, the two triangles are similar

Scale Factor

The ratio of any two corresponding lengths in two similar geometric figures

Corresponding Angles

When two parallel lines are crossed by another line (transversal) the angles in matching corners are congruent.