The same as you would calculate any other area. For example, if the base happens to be rectangular, you multiply length x width.
The base of a rectangle is a length and does not have any area. Therefore, the area can not be calculated.
Area = 0.5*base*altitude
The base of a cone is a circle. The area of a circle is found by multiplying the diameter by Pi.
Area in square units = base*height
area of a square is base times height area of a triangle is base times height divided by two!!
bigger base + smaller base x height/2
To calculate the area of a triangle, you can use the formula: Area = 1/2 × base × height. You need to know the lengths of the base and the height of the triangle. If you provide those measurements, I can help you calculate the area.
base X height
Area = 1/2*base*perpendicular height.
0.5*base*perpendicular height, in appropraite units for area.
Area = 1/2*base*perpendicular height
You will need to know the height before you can calculate the base form the area.