luas bangun diatas adalah
LUAS BANGUN
= L1 + L2 + L3
= ( ½ × π × r² ) + ( P|| × P|| ) + ( P|| × L|| )
= ( ½ × 22/7 × 7² ) + ( 10 × 14 ) + ( 20 × 5 )
= ( ½ × 22/7 × 49 ) + 140 + 100
= ( 11 × 7 ) + 140 + 100
= 77 + 140 + 100
= 77 + 240
= D. 317 Cm².
