berapakah luas bangun ABCDE ?

luas ADE = 1/2 X AD X DE
= 1/2 X 8 X 15
= 60
Luas trapesium = a x t
= 8 x 5
= 40
maka luas total 100

Ljajar genjang= a×t
L=8×5
L=40cm^2

a^2=b^2-c^2
a^2=17^2-15^2
a^2=289-225
a^2=64
a=8cm

Lsegitiga=1/2×a×t
L=1/2×8×15
L=4×15
L=60cm^2

Luas ABCDE=Ljajar genjang+Lsegitiga
L=40+60
L=100cm^2 (c)