Question 20
Which shape has an incorrect area formula? AI reconstruction: In the trapezium formula only, the A inside (A+B) denotes the other parallel side, whereas the A on the left denotes area. H is perpendicular height, B is base, r is radius, and π is used exactly (3.1416 in the legend is an approximation). In that trapezium formula, the raised H is explicitly corrected to multiplication by H, not exponentiation. The source picture is retained.
