Area of a disc
Types of exercises: formula with π, area of a disc from the radius, area of a disc from the diameter, area of part of a disc, radius and diameter from the area, area from the circumference and back, a circle and a square.
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Problem
Find the area of a disc of diameter 8 cm. Take π ≈ 3.14.
Give the exact answer with π
A circle is circumscribed about a square with side 18 dm - it passes through all the vertices of the square. What is the area of the disc inside this circle?
Problem
Find the area of a disc of radius 20 cm. Take π ≈ 3.14.
Choose the correct form
Which expression gives the area of a disc of radius 6?
Problem
The area of a disc is 452.16 cm². How long is its radius? Take π ≈ 3.14.
Problem
Find the area of a quarter of a disc of radius 2 cm. Take π ≈ 3.14.
Give the exact answer with π
A circle has a circumference of 16π m. What is the area of the disc inside this circle?
Problem
Find the area of a disc of diameter 30 cm. Take π ≈ 3.14.
Choose the correct answer
A disc is inscribed in a square with side 12 dm - it touches every side of the square. What is the area of the part of the square outside the disc?
Problem
Find the area of a disc of radius 17 cm. Take π ≈ 3.14.
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