Question

find thebarea of quadrilateral ABCD . AB= 4, AD= 17cm, DC=8cm,BC=? ​

Answer 1

Answer:

if we make its diagram we get a trapezium and area of trapezium =1/2 (sum of two parallel side )×h

Step-by-step explanation:

1st we find bc which is our height

by applying pythagoras theorem

h2= p2 + b2

(17)2=p2 +(8)2

289=p2+64

p2=225

p=15=bc

now we have to apply formula of area of trapezium =1/2 (sum of two parallel side)×h

1/2 (4+8)×15

6×15 = 90