Perimeter and Area of Plane Figures
Let denotes the sides of the Triangle. Then:
Let be the base, be the height (or perpendicular) and be the Hypotenuse. Then,
|Isosceles Right – angled triangle
Let the equal sides be .
Let each of the side is . Then
Let the equal sides be . Let the base be . Then
Let the length and breadth . Then
Let the side of the square . Then
Let the two adjacent sides of the parallelogram be and
A parallelogram that has all the sides equal is called a rhombus. If and are the diagonals, then
A trapezium is a quadrilateral two of whose sides are parallel. A trapezium whose non-parallel sides are equal is known as an isosceles trapezium.
Let and be the parallel sides and be the distance between the parallel sides. Then
If and are the perpendicular distances from the diagonal of the quadrilateral from the vertices and respectively. Then,