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AC = √(6²+8²) = 10
Luas . ACD = 1/2 Luas ABCD = 1/2 * 6 * 8 = 24
1/2 * AC * DE = 24
1/2 * 10 * DE = 24
5 DE = 24
DE = 24/5
CE² = CD² - DE² = 6² - (24/5)² = 12,96
CE = √12,96 = 3,6
Dg cara yg sama, diperoleh AF = CE = 3,6
maka EF = AC - (AF + CE) = 10 - (3,6 + 3,6) = 10 - 7,2 = 2,8