Areas
Basic formulas for Areas
1) Triangle 6) Radius of circumcircle  where a, b, c are the sides of the triangle and A is the area of the triangle.7) Radius of incircle  where A is the area of the triangle and s is the semi perimeter.8) Point where medians of a triangle meet is known as the Centroid. Centroid divides a median in the ratio 2:1. 9) Median divides a triangle into two parts of equal areas. 10) Sum of the angles of a triangle is 180°. 11) According to Triangle Inequality, Sum of two sides of a triangle is always greater than the third side. 2) Rectangle 3) Circle 4) Sector of a circle |