Multiple choice general knowledge

Geometry: The area of a circle can be determined by which of the following formulas?

  1. ½ base x height

  2. 2?r (2 pie r)

  3. x+y

  4. ?r2 (pie r square)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The area of a circle is calculated using the formula A = πr², where π (pi) is approximately 3.14159 and r is the radius of the circle. Option B '2πr' gives the circumference, not area. Option A '½ base × height' is for triangles. Option C 'x + y' is a simple algebraic expression with no geometric meaning. The area formula πr² is fundamental to geometry.

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