Tolong bantu untuk cari keliling nya, terimakasih.
26. K = 2.9 + 2.11 + 15 + 32 + 9 + 15 + 11 + x + 11 + 9
= 2.20 + 2.9 + 2.11 + 2.15 + 32 + x
= 2.20 + 2.20 + 62+x
= 2.40 + 62 + x
= 142 + x
x = 32 – (11+11)
x = 32 – 22
x = 10
K = 142 + 10 = 152 cm