Section B Section B Checkpoint

Problem 1

Select all expressions that represent the area of this rectangle.

Partially tiled rectangle with 6 length and 5 width.

Show Solution

Solution

A, D

Problem 2

Priya and Han are designing a tree fort with a rectangular floor. They want at least 30 square feet of floor space. The sides all have to measure less than 8 feet.

What are two possible pairs of side lengths for the floor of the fort? Explain your reasoning.

Show Solution

Solution

Sample responses:

A 6-foot-by-5-foot floor would give an area of 30 square feet.
A 7-foot-by-5-foot floor would give an area of 35 square feet.

Problem 3

Explain why the area of the rectangle is $5 \times 3$ square units.

Show Solution

Solution

Sample response: There are 5 columns and 3 squares in each column so that's

5 \times 3

total squares that cover the rectangle, with no gaps or overlaps.