Tolong dong nomor 19!!!
liwonsubagyo
L 1 = p x l .... = 54 x 25 ... = 1.350 cm².... L 2 = 1/2 x a x t .... = 1/2 x 54 x 15 .... = 27 x 15 ... = 405cm².... L.daerah yg diarsir = 1.350 - 405, .... = 945cm²
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liwonsubagyo
Sory soalnya kurang jelas makanya kukira 54 panjangnya