Question

Calculate the area of a trapezium , lengths of whose parallel sides ( represented by a and b ) and distance between them (h) are:

(i) a = 45 cm , b = 32 cm , h = 11 cm.
(ii) a = 4 dm , b = 8 cm , h = 1 m​

Answer 1

i.423.5

Step-by-step explanation:

area of trapezium=1/2×(a+b)h

here,a=45cm, b=32cm ,c=11cm

A= 1/2×(45+32)11

=1/2×77×11

=1/2×847

=847/2

=423.5

Answer 2

Answer:

1. 423.5 cm2
2. 420 cm2

Step-by-step explanation:

In 1st case

length of the parallel sides= 45cm, 32cm

" " " height = 11cm

area of trapezium = 1/2 ×(45 + 32) 11

=》1/2 × 77 × 11

=》1/2 × 847

=》423.5 cm2

In 2nd case

length of the parallel sides=4dm =0.4cm,

8cm

" " " height = 1m = 100cm

area of trapezium = 1/2 ×(0.4+8)100

=》1/2 × 8.4 × 100

=》1/2 × 840

=》420 cm2