HOPE: EXTRA CREDIT Unit 3B Test Review

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis. It is represented as (0, y) where y is the value of the y-intercept.

Front

If the scale factor is 4, how do you find the new length of a side?

Back

Multiply the original length by the scale factor. For example, if the original length is 5, the new length would be 5 * 4 = 20.

Front

What is a scaled copy in geometry?

Back

A scaled copy is a figure that is similar to another figure but is a different size. It maintains the same shape and proportions.

Front

How do you identify corresponding sides in similar figures?

Back

Corresponding sides are the sides that are in the same position in two similar figures. For example, if triangle ABC is similar to triangle DEF, then side AB corresponds to side DE.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but not necessarily the same size. Their corresponding angles are equal, and their corresponding sides are in proportion.

Front

What is the formula for finding the y-intercept from a linear equation?

Back

In the equation y = mx + b, the y-intercept is represented by b.

Front

How do you determine the scale factor between two similar figures?

Back

The scale factor is determined by dividing the length of a side of the scaled figure by the length of the corresponding side of the original figure.

Front

What is the relationship between the angles of similar figures?

Back

The corresponding angles of similar figures are equal.

Front

If a triangle has sides of lengths 3, 4, and 5, what would be the lengths of the sides of a triangle that is a scaled copy with a scale factor of 2?

Back

The sides would be 6, 8, and 10 (3*2, 4*2, 5*2).

Front

What is the significance of the scale factor in transformations?

Back

The scale factor determines how much larger or smaller a figure will be when it is transformed. A scale factor greater than 1 enlarges the figure, while a scale factor less than 1 reduces it.