Question

In an parllelogram measure of adjacent sides are 34 and 20 and one of the diagnal is 42 find the arwa ofparllelogram

Answer 1

we know that the base of parallelogram is 34 and one more side is 20 . If diognal =42.

In the figure lets take one triangle and find its area

according to herons formula

s =a +b+c ÷2

=34+ 20 +42 ÷2

= 48

now : root of s×s-a×s- ×s-c

= root of 48 × 48-34 × 48-20×48-42

=336 if one triangle of parallelogram is

336 then one triangle = 336 ×2= 672 is area