Radius & Diameter
Circumference and Area
Arcs and Sectors
Definitions
100
The diameter is 10cm. Find the radius.
The radius is 5cm.
100
A circle has a diameter of 12.5 m. What is the circumference?
The circumference is 39.25m.
100
A circle has an area of 12 ft squared. It is cut into 4 equal pieces. What is the area of each sector?
What is 3 ft squared.
100
What is a chord?
A line segment connecting 2 points on the circle.
200
The radius of a circle is 60mm. What is the diameter?
The diameter is 120mm.
200
A circle has a radius of 12.5 inches. What is the circumference rounded correctly to 2 decimals (no pi in the answer)?
What is 78.54 inches
200
A circle has a circumference of 22 feet. It is cut into 10 equal pieces. What is the length of each of the ten arcs?
What is 2.2 ft.
200
What is the definition of a secant?
A line that passes through 2 points on the circle.
300
The circumference of the circle is 18π cm. Find the radius.
The radius is 9 cm.
300
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
What is 7854 miles squared.
300
A pizza is 16 inches long (the diameter). The pizza is cut into 8 pieces. What is the length of crust (circumference) on each piece? You can put the answer in terms of pi
What is 2pi?
300
What is the definition of a Tangent?
A line that touches only 1 point on the circle.
400
The area of this circle is 25π cm2. Find the radius.
The radius will be 5cm.
400
A circle has a diameter of 16. Find the area in terms of pi.
What is 4(y^2)pi
400
A pizza is 16 inches long (diameter). It is cut into 4 pieces. Jane eats 3 of the pieces. What is the area of pizza she is eating?
What is 48 square inches.
400
Define radius, define diameter and explain the difference between the two terms.
Radius: a line segment from the center to any point on the circle.
Diameter: a line segment from the center to any point on the circle.
A Diameter is 2 times a circle's radius.
500
What is the diameter of the white circle?
The diameter is 12 ft.
500
A circle has a circumference of 6π m. What is the area?
The area is 28.26m2
500
Two circles are circumscribed. The outer circle has a radius of 9 inches. The inner circle has a radius of 6 inch. What is the area of the shaded region in terms of pi? There will be drawing on the board
What is 45pi
500
Define arc length, define circumference and explain the difference between the two terms.
Arc Length: part of/ fraction of circumference.
Circumference: distance around the outside of the circle (Perimeter).