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a. keliling = MN + KN + KL + LM
= 28 + 16 + 28 + 16
= 88
b. L = alas x tinggi
= 16 x 18
= 288
c. NP = Luas : alas
= 288 : 28
= 10,28
no 5
PT = a
ST = b
PSQ = 35 (sudut sehadap)
RSQ = 40 (sudut sehadap)