Similarity and Trigonometry

Dilate about point D, with a scale factor of 2.

What is the coordinate of point T'?

• (6, 0)

• (4, -4)

• (-4, -4)

• (5, 2)

Dilate about the origin, with a scale factor of 1/2.

What is the coordinate of point D'?

• (1,1)

• (4,4)

• (2.5, 2,5)

• (1,2)

The dashed-lined figure is a dilation image of the solid-lined figure.

State whether the dilation is an enlargement or a reduction

• enlargement

• reduction

• neither

• pie

The dashed-lined figure is a dilation image of the solid-lined figure.

What is the scale factor?

• 1/2

• 2

• 3

• 1

The lengths of the sides of a triangle are in the extended ratio 3: 4: 8. The triangle’s perimeter is 150 cm. What is the length of the short side?

The polygons below are similar. Find the value of the variable.

• 9

• 1

• 4

• 3

Determine whether the triangles are similar. If so, name the postulate or theorem you used.

• Yes, AA~

• Yes, SAS~

• Yes, SSS~

• Not similar

Determine whether the triangles are similar. If so, name the postulate or theorem you used.

• Yes, AA~

• Yes, SAS~

• Yes, SSS~

• Not similar

Determine whether the triangles are similar. If so, name the postulate or theorem you used.

• Yes, AA~

• Yes, SAS~

• Yes, SSS~

• Not similar

Determine whether the triangles are similar. If so, name the postulate or theorem you used.

• Yes, AA~

• Yes, SAS~

• Yes, SSS~

• Not similar