Question

Two adjecent sides of parallogram is 51cm anf 37 cm and its one daignol is 20cm finf the area​

Answer 1

Answer:

392.713636127

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Answer 2

Answer:

Let the two adjacent sides of the parallogram be a=51 cm , b=37 cm Let the length of. daigonal be c=20 cm. These two sides and the daigonal forms a triangle semi perimeter ,s= ( a+b+c) /2s =(51 +37 +20 )/2 =54 cm By Heron's formula ,we have area of triangle ,∆=√[54(54- 51 )(54-37)(54-20 )=√54 x 3 x 17 x 34 =306 sq cm Area of parallogram = 2 x area of triangle = 2 x 306 sq cm