Draw out what the question says. Geometric problems are easier to solve when they can be visualised. First calculate the area of the quarter circle: A = 1/4 \pi r^2Use Pythagoras to calculate the base length of the triangle. Base length found to be 3cm. Area of a triangle = 1/2 base multiplied by height. Therefore Area = 6cm^2. Area of the enclosing square is 64cm^2.Subtract the area of the triangle and quarter sphere from the square.