Area of Circle Portions

Instructions: Calculate the area of the shaded portion of a circle. Foundation: semicircles from a radius. Core: semicircles and quarter circles from a radius or diameter. Challenge: quarter, half, and three-quarter circles, decimal measurements, occasional reverse area questions, and rounding to the nearest whole number, tenth, or hundredth. Foundation rounds to whole numbers; Core rounds to the nearest whole number or tenth. Use π = 3.14 and enter numbers only. Get 3 correct answers to unlock the next level.