Rhomboid

Calculate the perimeter and area of a parallelogram with sides 19 and 20 and an included angle of 40°.

Final Answer:

S =  123.7159
o =  78

Step-by-step explanation:

a=19 b=20 α=19° rad=19° 180π =19° 1803.1415926 =0.33161  S=a b sinα=19 20 sin0.3316=123.7159
o=2 (a+b)=2 (19+20)=78



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