Find the area of the octagon ABCDEFGHABCDEFGH having each side equal to 17 cm,CH=DG=33 cm17 cm,CH=DG=33 cm and EL⊥DGEL⊥DG such that EL=15 cm.EL=15 cm.
Answer:
1311 cm21311 cm2
- Area of the octagon ABCDEFGH=ABCDEFGH= Area of trapezium DEFG+DEFG+ Area of trapezium ABCH+ABCH+ Area of rectangle CDGHCDGH =2× Area of trapezium DEFG+ Area of rectangle CDGH=2×12×(EF+DG)×EL+(CH×CD)=(17+33)×15+(33×17) cm2=750+561 cm2=1311 cm2