Similar Triangles

What does it mean for two shapes to be similar?

• Their angles add up to 180^o.

• They are congruent.

• Same shape, but different size.

• Same size and same shape.

What similarity theorem would prove that these triangles are similar?

• SAS∼
• SSS∼
• AA∼
• Side Splitter

State the postulate that proves these triangles are similar.

• SSS
• AA
• SAS
• Not similar

State the postulate that proves the triangles are similar.

• AA
• SAS
• SSS
• Not Similar

Find side length X.

• 16
• 18
• 2.4
• 15

Find side length X.

• 30
• 25
• 15
• 40

Are the triangles similar?

• Yes
• No

Are the triangles similar?

• Yes
• No