Which unit of measure would be appropriate for the area of a picture that is 20 centimeters tall and 15 centimeters wide?
A. Square centimeters
B. Meters
C. Cubic centimeters
D. Centimeters
Answer (1)
The area of a rectangle is found by multiplying its height and width.
The height of the picture is 20 cm and the width is 15 cm.
Multiplying these values gives the area: 20 cm × 15 cm = 300 cm 2 .
Therefore, the appropriate unit of measure is Square centimeters .
Explanation
Analyze the problem The picture is 20 centimeters tall and 15 centimeters wide. We need to find the appropriate unit for the area of this picture.
Determine the area unit To find the area of the picture, we multiply its height and width. Since the height and width are given in centimeters, the area will be in square centimeters.
Calculate the area The area of the picture is calculated as follows: A re a = h e i g h t × w i d t h = 20 cm × 15 cm = 300 cm 2 Therefore, the area is 300 square centimeters.
State the final answer The appropriate unit of measure for the area of the picture is square centimeters.
Examples
When you're tiling a floor, you need to calculate the area you want to cover. If you measure the length and width of the floor in meters, then the area will be in square meters. Knowing the area helps you determine how many tiles you need to buy. For example, if a room is 3 meters long and 4 meters wide, the area is 3 × 4 = 12 square meters.
