Quick Circle Area Warmup

Front

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

Back

A = π·r²

Front

What does the symbol π represent?

Back

Approximately 3.14

Front

What does 'r' represent in the area formula A = π·r²?

Back

Radius of the circle.

Front

What does 'A' represent in the area formula A = π·r²?

Back

Area of the circle.

Front

If the radius of a circle is 5, what is the area?

Back

A = π·5² = 78.5 (approximately)

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius.

Front

How do you find the radius if you know the area of the circle?

Back

r = √(A/π)