Question

The diagonals for a parallelogram have lengths of 8 and 11. Find the area and perimeter if the diagonals create a 138 degree angle

Answer 1

perimeter is 42.19( ) and area is 10.5475 x 2= 21.0950( )^2

Explanation:

138-180 =180-42 =138angle either side so the relation is 8x11 x2 and 126 makes half 4x4.5 so the extra 12 is 12/138/2 = 12.5% =6.25% of 8x11 = 0.5 +0.6875 +4x4.5=5.36+5.1875= 10.5475 x 4=42.19