8th Grade Unit 4 Review Game

Front

Are these triangles similar? Known angles in Triangle 1: 40⁰, 60⁰; Known angles in Triangle 2: 80⁰, 40⁰.

Back

Yes, triangles are similar if their corresponding angles are equal.

Front

If the variables p and q are proportional, and p=25 and q=15, what is the value of q when p=45?

Back

q = 27 when p = 45.

Front

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image for A(3,3), B(6,6), C(9,3)?

Back

A'(9,9), B'(18,18), C'(27,9).

Front

What is the height of the Tree?

Back

The height of the tree is 20.

Front

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with a scale factor of 2.

Back

B' (8, 18).

Front

What is the definition of similar triangles?

Back

Similar triangles have the same shape but may differ in size; their corresponding angles are equal and their corresponding sides are proportional.

Front

What is the formula for finding the scale factor in dilation?

Back

Scale factor = (length of image)/(length of original figure).

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Front

What is the relationship between the angles of similar triangles?

Back

The corresponding angles of similar triangles are equal.

Front

What is the formula for dilating a point (x,y) by a scale factor k?

Back

The new coordinates are (kx, ky).