Math and Trivia Quiz

What is the formula to calculate the circumference of a circle?

• 2πr

• πr

• π/2r

• r/2π

If the radius of a circle is 5 cm, what is its circumference?

• 25π cm

• 10π cm

• 20π cm

• 15π cm

What is the formula to find the area of a circle?

• A = 2πr

• A = πr^2

• A = πd

• A = πr

If the radius of a circle is 3.5 cm, what is its area?

• 21.98 square cm

• 12.25 square cm

• 38.48 square cm

• 7.07 square cm

What is the value of pi (π) used in circle calculations?

• 3.1416

• 3.14

• 22/7

• 3.14159

What is the circumference of a circle with a diameter of 10 cm?

• 20 cm

• 15.7 cm

• 31.42 cm

• 25.13 cm

What is the area of a circle with a radius of 6.2 cm?

• 36.4

• 120.77

• 18.2

• 72.8

Which mathematician is credited with discovering the concept of pi (π)?

• Albert Einstein

• Galileo Galilei

• Archimedes

• Isaac Newton

What is the formula to calculate the circumference of a circle in terms of its diameter?

• C = 2πd

• C = πr

• C = 2d

• C = πd

What is the area of a circle with a diameter of 8.5 cm?

• 125.6 cm^2

• 34.25 cm^2

• 226.87 cm^2

• 67.856 cm^2