Optional Practice - Unit 7 Study Guide Part A

Front

What is the square root of 81?

Back

9

Front

Is the proportion 1/3 and 4/12 equal?

Back

Yes, 1/3 = 4/12.

Front

If two figures are similar, how do you find a missing side?

Back

Use the ratio of corresponding sides.

Front

In similar figures ABCD and XYZW, what is true about angle A and angle X?

Back

Front

What is a dilation in geometry?

Back

A transformation that changes the size of a figure but not its shape.

Front

What is the algebraic representation of a dilation?

Back

@@(x, y) ightarrow (kx, ky)@@ where k is the scale factor.

Front

What is the scale factor in a dilation?

Back

The ratio of the lengths of corresponding sides of the original figure and the image.

Front

How do you determine if two ratios are equivalent?

Back

Cross-multiply and compare the products.

Front

What does it mean for two figures to be similar?

Back

They have the same shape but may have different sizes.

Front

What is the relationship between corresponding angles in similar figures?

Back

Corresponding angles are equal.