Question

Tolong d bntuy. bsok d kmpul(pke jlanx). yg no 7,8

Answer 1

7. Panjang sisi terpanjang = 6 / 15 . 105
                                                 = 6.7
                                                 = 42 cm
8. L = a.t / 2
    252 = 36 . t / 2
    252 = 18t
     t = 252 / 18
       = 14

Answer 2

7) misal: s1 = 4n, s2 = 5n, dan s3 = 6n
K.segitiga = 105
s1 + s2 + s3 = 105
4n + 5n + 6n = 105
15n = 105
n = 105/15 = 7
sisi terpanjang = s3
= 6n
= 6.7 = 42 cm(B)

8) t = 2.L/a
= 2.252/36
= 14 cm(A)