If the angles of a triangle are in the ratio of 1:4:7, then find the ratio of the greatest angle to the smallest angle.

Δ ABC is a right angled triangle whose angle A is right angled. Which side needs to bisect to form two other right angled triangles?

In the figure below, O of the circle is the centre. OA = 3 cm, AC = 3 cm and OM is perpendicular to AC. So the value of ∠ABC will be

Four coins whose diameter is 12.6 cm are placed in such a way that one coin touches the other coin, find the area between them.

The centroid of a ∆ABC is G. The area of ∆ABC is 60 cm². The area of ∆GBC is

If the circumradius of an equilateral triangle ABC be 8 cm, then the height of the triangle is 

The largest and the smallest angles of a triangle are in the ratio of 3:1 respectively. The second largest angle of the triangle is equal to 56°. What is the value of largest angle of the triangle?

If the perimeter of an equilateral triangle is 18 cm, then length of each median is