carilah luas daerah berbayang! dengan cara

L1 = 10 x 10/2
= 10 x 5
= 50

L2 = 3 x 10
= 30

L3 = 10 x 10/2
= 10 x 5
= 50

L4 = 3 x 3/2
= 4,5

Ltotal = L1 + L2 + L3 + L4 = 50 + 30 + 50 + 4,5 = 134,5