luas yg diarsir berarti =
segitiga AEB + L.segitiga AED − 2 x L.segitiga AEC =
(1/2 x 18 x 15) + (1/2 x 18 x 24) - (2 x 1/2 x 18 x 6 =
135 + 216 - 108 =
351 - 108 =
243
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luas yg diarsir berarti =
segitiga AEB + L.segitiga AED − 2 x L.segitiga AEC =
(1/2 x 18 x 15) + (1/2 x 18 x 24) - (2 x 1/2 x 18 x 6 =
135 + 216 - 108 =
351 - 108 =
243