Circumference and Area Applications

what is the area of a circle with the diameter of 10cm ?

• 66cm

• 78.5cm

• 66.5cm

• 10m

What is circumference?

• The distance around a circle.

• The space inside the circle.

• A line from side to side passing through the center.

• A line from the center to the side.

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

What is the significance of Pi in geometry?

• Pi is the value of 3.0

• Pi is only relevant in algebra, not geometry

• Pi is significant in geometry because it is the ratio of a circle's circumference to its diameter.

• Pi is used to calculate the area of a square

What is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

Find the circumference (to the nearest whole number)

• 88 in

• 44 in

• 116 square in

• None of the above

Daniel wants to buy cookies for his friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

What is the formula for Circumference?

• C = π×r²

• C = 2×π×r

Find the area of the circle below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²