How to take the angle when only two sides of the parallelogram are given?
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How can I find the interior angles of a parallelogram with just the sides and area?
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Girija Warrier, Passionate about Maths & Music...
Answered Apr 1, 2017 · Author has 1.7kanswers and 1.2m answer views

GIVEN: Sides AB = a unit , AD = b unit
& area of parallelogram ABCD = x sq unit
DE is perpendicular to AB
TO FIND : Interior angles
area( parallelogram) = AB * DE
=> x = a* DE
=> DE = x/a …….(1)
Now, in triangle AED ,
Sin A = DE/AD = x /(ab)
Sin A = area/( product of the sides)●●●●●●(1)
So, we can get the value of A , & A= C
Then B = 180° - A = D
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3 ANSWERS

Girija Warrier, Passionate about Maths & Music...
Answered Apr 1, 2017 · Author has 1.7kanswers and 1.2m answer views

GIVEN: Sides AB = a unit , AD = b unit
& area of parallelogram ABCD = x sq unit
DE is perpendicular to AB
TO FIND : Interior angles
area( parallelogram) = AB * DE
=> x = a* DE
=> DE = x/a …….(1)
Now, in triangle AED ,
Sin A = DE/AD = x /(ab)
Sin A = area/( product of the sides)●●●●●●(1)
So, we can get the value of A , & A= C
Then B = 180° - A = D
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