Question

No.3&4
please buat besok pagi

Answer 1

3.
luas alas kubus = 144
a. panjang rusuk kubus = √144 = 12
b.diagonal QV =a√2 = 12√2
c. luas bidang diagonal PQVW = 12 x 12√2 = 144√2

4.
a. SR = KL = 10
   PS = LM = 8
   KP = MR = 5
b. Panjang LN =
  √(10²+8²) = √164 = 12,8
c luas bidang NLQS = 12,8 x 5 =.64