Area of Rectangles

Area is the measurement indicating how much space on a plane is taken up by a two-dimensional shape. While perimeter is measured in units of length, area is measured in square units. We will discuss units of measurement in more detail in the next section. Watch this lecture series about calculating the area of rectangles, and complete the interactive exercises.

Practice

Transition from unit squares to area formula - Questions

1. is 1 unit square.

Which expressions can we use to find the area of the rectangle?

Choose 2 answers:

(A) $5 \times 9 \times 5 \times 9$

(B) $5+5+9+9$

(D) $5 \times 9$

2. Which equation shows a way to find the area of the following rectangle?

Choose 1 answer:

(A) 9 units $\times 7$ units $=63$ square units

(B) 6 units $\times 3$ units $=18$ square units

(D) 5 units $\times 7$ units $=35$ square units

3. is 1 unit square.

Which expressions can we use to find the area of the rectangle?

Choose 2 answers:

(A) $3+9$

(B) $9+9+9$

(D) $3 \times 9$

4. Which expression shows a way to find the area of the following rectangle?

Choose 1 answer:

(A) $4+2+1+1$

(B) $5+5+5+5+5$

(D) $4 \times 4$

5. is 1 unit square.

Which expressions can we use to find the area of the rectangle?

Choose 2 answers:

(A) $5 \times 7$

(B) $5 \times 5 \times 5 \times 5 \times 5 \times 5 \times 5$

(D) $5 \times 7+5 \times 7$

6. Which equation shows a way to find the area of the following rectangle?

Choose 1 answer:

(A) 9 units $\times 4$ units $=36$ square units

(B) 9 units $+4$ units $=13$ units

(D) 9 units $\times 3$ units $=27$ square units

7. is 1 unit square.

Which expressions can we use to find the area of the rectangle?

Choose 2 answers:

(A) $7+7+7+7+7+7+7$

(B) $7 \times 7$

(D) $8+8+8+8+8+8+8$