ParaPro Assessment 2025 – 400 Free Practice Questions to Pass the Exam

The area of a circle is calculated using the formula A = πr², where A represents the area and r is the radius of the circle. This formula arises from the relationship between the radius and the space enclosed within the circle. The constant π (pi) is approximately 3.14159 and represents the ratio of the circumference of any circle to its diameter. Using this formula, one can find the area by squaring the radius (multiplying the radius by itself) and then multiplying that result by π, effectively measuring how much space is inside the boundary of the circle. This makes it a vital formula in geometry, particularly when dealing with circular shapes.

Other options represent different mathematical concepts: 1/2 bh is the formula for the area of a triangle, 2πr is the formula for the circumference of a circle, and LWH describes the volume of a rectangular prism. Each of these serves a distinct purpose in geometry, demonstrating the importance of using the correct formula for the specific shape being analyzed.