Question

Tolong dibantu yaa kawan..
ini aku ganherti caranya

Answer 1

Misal : PQ = 7n , SR = 2n
maka :
L = 1/2.jumlah sisi sejajar.t
108 = 1/2.(7n+2n).8
108 = 4.9n
108 = 36n
n = 108/36
n = 3

sehingga didapat :
PQ = 7n = 7.3 = 21 cm
SR = 2n = 2.3 = 6 cm


selisih sisi sejajar = 21-6 = 15 cm
maka :
sisi miring (RQ) = akar dr 15²+8²
= akar dr 225+64
= √289
= 17 cm

jadi, K = PQ+RQ+SR+PS = 21+17+6+8 = 52 cm