yu giv 2 sides & 1 angel, so me assume angel tween the 2 sides
lengths=6.5 & 5.2
angel=120 deg
##### side3=10.15332
angels: 10.15332, 43.85378, 60 deg
area=14.63583, base=6.5, hite=4.5033333
rim-leng=21.85332
top point=(-2.6, 4.50333333)
inside serkel...radius=1.33946 & senter=(0.77333, 1.33946)