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= (20+30) x 15 / 2
= 50 x 15 / 2
= B. 375 cm2
25. Ltrapesium 1 = (a+b) x t / 2
= (6+15) x 6 / 2
= 21 x 6 / 2
= 63 cm2
Ltrapesium 2 = (a+b) x t / 2
= (12+18) x 9 / 2
= 30 x 9 / 2
= 135 cm2
Total : 63 + 135
= B. 198 cm2
*SEMOGA MEMBANTU