Parts of a Circle
Pi & Circumference
Area of Circles
Triangles & Parallelograms
Circle Word Problems
100
What is the term for a line segment that connects the center of a circle to any point on its circumference?
Radius
100
What is the approximate value of pi (π)?
3.14
100
What is the formula for the area of a circle?
100
What is the formula for the area of a triangle?
A = 1/2bh
100
A circular garden has a radius of 7 meters. What is the circumference of the garden? (Use π ≈ 3.14)
C ≈ 43.98 m
200
What do you call a line segment that passes through the center of a circle and has its endpoints on the circle?
Diameter
200
What is the formula for the circumference of a circle using the diameter?
200
Calculate the area of a circle with a radius of 3 cm. (Use π ≈ 3.14)
A ≈ 28.27 cm²
200
Calculate the area of a triangle with a base of 8 cm and a height of 5 cm.
A = 20 cm²
200
A circular track has a diameter of 20 meters. What is the area of the track?
A ≈ 314.16m²
300
Define a chord in the context of a circle.
A straight line segment connecting two points on the circle's circumference.
300
What is the formula for the circumference of a circle using the radius?
300
Calculate the area of a circle with a diameter of 10 cm.
A ≈ 78.54 cm²
300
What is the formula for the area of a parallelogram?
A = bh
300
If you walk around a circular pond with a radius of 5 meters, how far have you walked?
31.41m
400
How is the diameter of a circle related to its radius?
The diameter is 2 times the radius or radius is half of the diameter.
400
If a circle has a diameter of 10 cm, what is its circumference? (Use π ≈ 3.14)
C ≈ 31.42 cm
400
If a circle has an area of 78.5 cm², what is its radius?
r ≈ 5 cm
400
Calculate the area of a parallelogram with a base of 10 cm and a height of 4 cm.
A = 40cm²
400
A circular table has a diameter of 1.5 meters. What is the area of the tabletop?
A ≈ 1.77m²
500
If a circle has a radius of 4 cm, what is its diameter?
8 cm
500
If a circle has a radius of 7 cm, what is its circumference?
C ≈ 43.98 cm
500
Compare the areas of two circles with radii of 5 cm and 10 cm. How many times larger is the area of the larger circle?
The area of the larger circle is 2 times larger than the area of the smaller circle.
500
A triangle and a parallelogram both have a base of 6 cm and a height of 3 cm. Compare their areas.
The area of the paralellogram is 18cm2. The area of the triangle is 9cm2, because it is half of the area of the paralellogram.
500
A circular rug has a radius of 2 meters. What is the circumference and area of the rug? (Use π ≈ 3.14)
C ≈ 12.57m
A ≈12.57 m²