California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare for the California Assessment of Student Performance and Progress Math Test. Engage with challenging questions designed to help you master math concepts. Get equipped for your exam success!

Practice this question and more.

What is the perimeter of a rectangle with a length of 10 cm and a width of 4 cm?

28 cm
40 cm
24 cm
30 cm

The correct answer is: 28 cm

To find the perimeter of a rectangle, you use the formula: Perimeter = 2 * (Length + Width). In this instance, the length is given as 10 cm, and the width is given as 4 cm. Plugging these values into the formula: Perimeter = 2 * (10 cm + 4 cm) = 2 * (14 cm) = 28 cm. Thus, the calculated perimeter of 28 cm is the correct answer because it accurately reflects the total distance around the rectangle, which is determined by doubling the sum of the length and width. This understanding is crucial because it combines not just the individual measurements but also the concept of perimeter being a total encompassing value.