Area, Circumference Applications

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²

• 45.6 cm²

• 50.24 cm²

• 55.9 cm²

What is the formula for CIRCUMFERENCE of a circle?

• C=πd

• C=πd²

• A=πr²

• C=πβγΔ

What is the formula for area of a circle?

• C=πd

• C=πd²

• A=πr²

• A= C/d

Steven purchases a bowl. The diameter of the

bowl is 14 cm. What is the distance around the bowl?

• 21.98 cm

• 43.96 cm

• 87.96 cm

• 7 cm

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area

What is the relationship between the circumference of a circle and its diameter?

• Circumference = Diameter / π

• Circumference = 2 x Diameter

• Circumference = π x Diameter

• Circumference = Diameter + Radius

How is Pi used in real-world applications?

• Pi is used for predicting the weather

• Pi is used in various real-world applications such as calculating the circumference and area of circles, in engineering for structural analysis and design, and in physics for wave and oscillation calculations.

• Pi is used for social media algorithms

• Pi is used for cooking recipes

Determine the area of the shaded region.

Use 3.14 for π.

• A = 30.96 in²

• A = 34.96 in²

• A = 36 in²

• A = 39 in²

Tags

7.9.C

Describe how the circumference and the

diameter of a circle are related.

• The ratio of the circumference to the radius is approximately 3.14 or π

• The ratio of the diameter to π (3.14) is the circumference

• The ratio of the circumference to the diameter is approximately 3.14 or π

• They aren't related, they're just good friends :)

Tags

7.5.B

7.8.B

A button has a diameter of 4 centimeters. What is the

area of the button?

Area = ___cm²

Tags

7.9.B