The sides of the parallelogram are 8 cm and 6 cm long, and the diagonals' angle is 60°. What is its area?

Correct answer:

S =  66.954 cm2

Step-by-step explanation:

a=8 cm b=6 cm  X=60  Y=180X=18060=120   S1=ΔBCS=bbb S2=ΔBSA=abb  S1=3/4 b2=3/4 62=9 3 cm215.5885 cm2  s=2a+b+b=28+6+6=10 cm  S2=s (sa) (sb) (sb)=10 (108) (106) (106)=8 5 cm217.8885 cm2  S=2 S1+2 S2=2 15.5885+2 17.8885=66.954 cm2

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