#tolong yh ka nomor 7 dn 8

8.
180        = (3a + 60) + 2a
              = 5a + 60
180 - 60 = 5a
120        = 5a
120/5     = 5a
24          = a

∠KLM = 3a + 60
           = 3(24) + 60
           = 72 + 60
           = 132°

maaf klo saah :)

luas lantai = 660 cm x 360 cm
= 237600 cm^2
Luas ubin = 30 cm x 40 cm
= 1200 cm^2
Jadi banyak ubin = 237600/1200 = 198 buah

8) 180 = 3a + 60 + 2a
180 = 5a + 60
180 -60 = 5a
120 = 5a
120/5 = a
24 = a
KLM = 3a + 60 = 3(24) + 60 = 72 + 60 = 132