Perimeter of a Triangle:
If a, b and c units be the lengths of the sides of a triangle, perimeter = a + b + c
or 2s = a + b + c, where 2s denotes the perimeter of the triangle.
Heron’s Formula for Area of a Triangle:
If a, b and c are the sides of a triangle and 2s = a + b + c, the area of the triangle is given by:
A = √s(s - a)(s - b)(s - c)
Area of an Equilateral Triangle:Read More...
► Parallelogram on the same base and between the same parallels is equal in area.
Theorem 2:Read More...
► Circle is the locus of all such points which are equidistant from a fixed point, this point is known as centre while distance of any point from centre defined as radius of circle.
► A line joining two points on a circle is known as the chord of the circle.
A line which intersects a circle in two distinct points is called a secant of the circle.