Abuilding was measured with a degree of accuracy to the nearest 0.5ft; 30ft × 40ft. what is the largest possible area of the building to the nearest ft2?

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.