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Laabri

Open Up - Grade 7 - Mathematics - Unit 3 - Lesson 4

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"Source: Open Up Resouces (Download for free at openupresources.org.)"

Asemmisa {{asɛmmisaAhyɛnsode}}
1.

Here is a picture of a Ferris wheel. It has a diameter of 80 meters.

On the picture, draw and label a diameter.

Asemmisa {{asɛmmisaAhyɛnsode}}
2.

Here is a picture of a Ferris wheel. It has a diameter of 80 meters.

Using your answer from question 1 how far does a rider travel in one complete rotation around the Ferris wheel?(Round to the nearest whole number)

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The length of the minute hand on a clock is 5 in.

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The distance across a sink drain is 3.8 cm.

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The tires on a mining truck are 14 ft tall.

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The fence around a circular pool is 75 ft long.

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The distance from the tip of a slice of pizza to the crust is 7 in.

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

Breaking a cookie in half creates a straight side 10 cm long.

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

The length of the metal rim around a glass lens is 190 mm.

Asemmisa {{asɛmmisaAhyɛnsode}}
10.

Identify each measurement as the diameter, radius, or circumference of the circular object. Then, estimate the other two measurements for the circle.

From the center to the edge of a DVD measures 60 mm.

Asemmisa {{asɛmmisaAhyɛnsode}}
11.

A half circle is joined to an equilateral triangle with side lengths of 12 units.

What is the perimeter of the resulting shape? (Round to the nearest hundreth)

Asemmisa {{asɛmmisaAhyɛnsode}}
12.

Circle A has a diameter of 1 foot. Circle B has a circumference of 1 meter.

Which circle is bigger?

Asemmisa {{asɛmmisaAhyɛnsode}}
13.

The circumference of Tyler's bike tire is 72 inches.

What is the diameter of the tire? (Round to the nearest whole number.)