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= (a+b)t : 2 + s²
= (8+14)4 : 2 + 8²
= (22)2 + 56
= 44 + 56
= 100 cm²
2) • d1 = 6
• d2 = 3
= d1 x d2 : 2
= 6 x 3 : 2
= 18 : 2
= 9 cm²
karena belah ketupatnya ada 2,jadi dikali 2
= 9 x 2
= 18cm²