The side of a triangle or parallelogram used to help find area is called the base. Area is base times height in a parallelogram. In a triangle, it is 1/2 times base times height.
It is usually called the "base".
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It would help to answer the question if there was any information about the shape itself: a triangle, a parallelogram, ... Clearly, that was too much to expect.
The formula for the area of a parallelogram is the same as for a rectangle. base x height Just remember that the height is a line drawn perpendicular to the base, not the other side length.
It would help to know "... the point of intersection of a parallelogram" and what!
For finding the area of triangle with the help of Heron's formula: [s(s-a)(s-b)(s-c)]1/2 where a,b,c are sides of the triangle and s=1/2 of perimeter of the triangle
Triangles have only three sides; all quadrilaterals, including parallelograms, have four.
A parallelogram is a degenerate trapezoid: as the longer of the parallel sides of a trapezoid shrinks to the length of the shorter parallel side, the trapezoid becomes a parallelogram. It is truer to say that the area of a trapezoid helps to find the area of a parallelogram: area_trapezoid = mean_average_of_parallel_sides x distance_between_them = 1/2 sum_parallel_side_lengths x distance_between_them When the parallel sides are of equal length this becomes: area = (1/2 x 2 x length_of_parallel_sides) x distance_between_them = length_of_parallel_sides x distance_between_them = area_parallelogram
i can't help you solve this if i cannot see the triangle. What are the values involved, aside from the area?