First add the lengths of the three sides, a,b,c and divide by two (= half the perimeter).
Call that S.
Area = square root of (S*(S-a)*(S-b)*(S-c))
First the subtractions, then the multiplications and finally the square root.
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It is impossible to find the area of a triangle with no height, if the triangle had no height it would not even be a triangle, just a angle.
You find the height by using Pythagoras' theorem and then 0.5*base*height = area.
you can't unless you measure it.
To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle. To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle.
You need to measure how wide it is and the height of the triangle then multiply them together and the you get your answere.