OT = OP = QR = QS = 14cm
QS = QR + RS
= 14 + 14
= 28cm
Luas seluruh rajah = 20 x 28
= 560cm2
Luas semi bulatan kecil = πj2 x 1/2
= 22/7 x (RS/2)2 x 1/2
= 22/7 x (14/2)2 x 1/2
= 22/7 x 72 x 1/2
= 77cm2
Luas semi bulatan besar = πj2 x 1/2
= 22/7 x 142 x 1/2
= 308cm2
Luas berlorek = 560 - 77 - 308
= 175cm2
