Question

lesson 2: drilling for understanding

1. for each surface area, circle the best referent for measuring that area.

a. area of lawn steps quarters
b. surface area of an orange uniform circular stickers popsicle sticks
c. surface area of walls for painting arm span hand span

1. for the following dimensions or areas, suggest a referent:

a. width of a pizza
b. area of a roof
c. height of a flagpole

Explanation:

Step1: Consider the size of lawn

Lawns are large - scale areas. Steps can be used to roughly measure large - scale areas as they cover a certain length with each step.

Step2: Consider the surface of an orange

The surface of an orange is curved and small. Uniform circular stickers can be used to cover and measure its surface area as they can conform to the curved surface.

Step3: Consider the walls for painting

Walls for painting are usually large. Arm span is larger than hand span and is more suitable for measuring larger areas like walls.

Step4: For width of a pizza

A hand span can be a good referent as pizzas are usually of a size that can be related to hand - sized measurements.

Step5: For area of a roof

Roofs are large. Steps can be used to measure the length and width and then estimate the area.

Step6: For height of a flagpole

A person's height can be a referent. We can estimate how many times a person's height the flagpole is.

Answer:

1.
a. Steps
b. Uniform circular stickers
c. Arm span
2.
a. Hand span
b. Steps
c. Person's height