THIS IS WAY TOO HARD NO WAY
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Measure it or use trigonometry if the 'included' angle is given.
It is: perimeter minus hypotenus+base = height Area = 0.5*base*height
That depends on what type of triangle is if the side given is equal to the perimeter divided by 3 then it is an equilateral triangle.
Knowing only the angles of a triangle does not provide enough information to determine its perimeter. You must know the length of at least one side.
If you know the lengths of 2 sides and the included angle then use: Area of a triangle = 1/2*a*b*sinC