Question

Which of the following units could be used to measure Area? Select all that apply.

a) m2

b) in

c) cm2


d) sq. ft

e) mm

f) yd3

Answer 1

a) c) d)

Explanation:

Length is a one-dimensional measure, therefore it is measured in single units.

⇒ m

⇒ cm

⇒ ft

The area of a shape is a two-dimensional quantity (e.g. length × width), therefore it is measured in square units.

⇒ m × m = m²

⇒ cm × cm = cm²

⇒ ft × ft = ft²

The volume of a shape is a three-dimensional quantity (e.g. length × width × height), therefore it is measured in cubic units.

⇒ m × m × m = m³

⇒ cm × cm × cm = cm³

⇒ ft × ft × ft = ft³

Therefore,

• length = options b) e)
• area = options a) c) d)
• volume = option f)

Answer 2

All the area measure units should have square above them.

For example:

1. mm²
2. cm²
3. yd²
4. in²
5. m²
6. km²
7. ft²

Hence, option A, C, D is correct.