IM Benchmark #1 Review

Front

What is the scale factor from one shape to another?

Back

The scale factor is a number that describes how much a shape is enlarged or reduced. It is the ratio of the lengths of corresponding sides of two similar shapes.

Front

What are corresponding sides in similar shapes?

Back

Corresponding sides are the sides that are in the same position in two similar shapes. They maintain the same ratio in size.

Front

How do you calculate the circumference of a circle?

Back

The circumference of a circle can be calculated using the formula C = 2πr, where r is the radius.

Front

If the circumference of a circle is 44π feet, what is the radius?

Back

The radius is 22 feet.

Front

What is the formula for finding the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where r is the radius.

Front

What happens to the dimensions of a shape when it is enlarged by a scale factor?

Back

When a shape is enlarged by a scale factor, all dimensions (length, width, height) are multiplied by that scale factor.

Front

What is the relationship between the scale factor and the area of similar shapes?

Back

The area of similar shapes is proportional to the square of the scale factor.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object that is proportional to its actual size, using a specific scale.

Front

If a shape is reduced by a scale factor of 1/2, what happens to its dimensions?

Back

All dimensions of the shape are halved.

Front

What is the difference between congruent shapes and similar shapes?

Back

Congruent shapes are identical in size and shape, while similar shapes have the same shape but may differ in size.