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The Formula is Base*Height, or 1/2 Height (altitude of the triangle) * Base (of the Triangle) * height (Height of the prism)
The formula for finding the area of a triangle is half of the base x the height. For this triangle, it would be 1/2 of 10 X 3, or 15 square units.
the formula is 1side multiply by 3
Area=1/2(base*height) where either side can be the base or the height in a right triangle.
To find the volume, you first find the area of the triangle base and then multiply it be the height.