Question

the figure, ABCDE is a pentagon of side 15 cm
dividing it into two different ways, find its area.
the Fig.11.21. ABCD is a trapezium with BC = 48 cm, CD = 17cm, AD 40 cm
and AB BC. If the perimeter of the trapezium is 120 cm, find its
area
Hint: AB = 15 cm]
15 cm
Fig. 11.20i​

Answer 1

Answer:

Perimeter =120 m.

48+17+40+x=120

x=15 m.

Area =

2

1

(sum of parallel sides) × height

=

2

1

(48+40)×15

=660 m

2

.