Lenght X Width, then you divide the number by 2.
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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.
Area of a triangle = 0.5*base*perpendicular height
Find the area of the triangle 4inch tall 3.2 base
A= 1/2(b)(h)
Area of a triangle = 1/2*base*height