Area[ABDE] = AB^2 = 144 dm^2
Area[AEF] = 7/12 * 144 dm^2 = 84 dm^2
Area[BCD] = 5/16 * 144 dm^2 = 45 dm^2
Dalle aree deduciamo la misura delle altezze
h[AEF] = 2 Area[AEF]/AB = 2*84/12 dm = 14 dm
h[BCD] = 2 Area[BCD]/AB = 2*45/12 dm = 7.5 dm
CF = h[BCD] + AB + h[AEF] = (7.5 + 12 + 14) dm = 33.5 dm.
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Area[ABDE] = AB^2 = 144 dm^2
Area[AEF] = 7/12 * 144 dm^2 = 84 dm^2
Area[BCD] = 5/16 * 144 dm^2 = 45 dm^2
Dalle aree deduciamo la misura delle altezze
h[AEF] = 2 Area[AEF]/AB = 2*84/12 dm = 14 dm
h[BCD] = 2 Area[BCD]/AB = 2*45/12 dm = 7.5 dm
CF = h[BCD] + AB + h[AEF] = (7.5 + 12 + 14) dm = 33.5 dm.