Home » Geometry » Regular 2D Shape Area Formulas
2d shapes are which drawn on plane. Have the property of area. Basic 2d objects include triangle, circle, rectangle, square, parallelogram, rhombus, irregular quadrilateral, n-polygon and etc.
2d shape Area formulas:
It is a 2d shape that has 3 sides.
A = 1/2 x base * height
A = ( s x ( s – a ) x ( s – b ) x ( s – c ) )1/2
where a, b, c are sides of triangle, s = ( a + b + c ) / 2
It has only on curved edge and every point one edge is equidistant from central point.
A = π x radius²
Circle Calculator – Calculate circle area and perimeter, sector area and arc length.
This 2d shape has four equal length straight edges and all four corners are right angles.
A = side²
Parallel edges are equal in length. All four corners are right angles.
A = length x width
Four side 2d shape having opposite sides as equal in length and parallel.
A = height x base
Four side 2d shape having four equal length edges.
A = 1/2 x diagonal1 x diagonal2
It is a 2d shape having four straight edges. Only one pair of opposite edges are parallel.
A = 1/2 x height x (base1 + base2)