How to find the Area of the triangle with the number given? Thanks!

Question

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Answer 1 · 2018-05-13T20:04:56

See explanation.

If (as in this question) 2 sides of a triangle and the angle between them is given then the area of the triangle can be calculated as:

#A=1/2ab*sinalpha#

Here the area is:

#A=1/2*7*10*sin20^o~~35*0.342~~11.97~~12#

Answer:
The area of the triangle is: #A~~12# square yards