If one of the equal angles of an isosceles triangle is 65°, then the angle at the vertex is

G is the centroid of a triangle ABC, and the median is AD, the ratio of AD and GA is

The ratio of circumradius and hypotenuse a right-angled triangle is

O is the orthocentre of ΔABC. If ∠BOC=110°, ∠BAC is equal to

The area of a rhombus is 144 square units. The length of one of its diagonals is twice the length of other diagonal. What is the sum of length of its diagonals?

A circle with radius 42 cm is drawn. What will be length of arc of a sector subtending an angle of 60 degrees at the Centre?

If the area of a circle is 9π sq.cm then it circumference is

The area of a triangle is 456 sq.cm and its height is 24 cm. The length of its base is