Given an isoceles triangle with equal side of length b and angle `alpha lt pi//4`, then
the circumradius R is given by

Given an isoceles triangle with equal side of length b and angle alpha lt pi//4 , then the inradius r is given by

Given an isoceles triangle with equal side of length b and angle alpha lt pi//4 , then the distance between circumcenter O and incenter I is

Given an isosceles triangle with lateral side of length b, base angle alphalt pi/4, R,r the radii and O, I the centres of the circumcircle and incircle respectively, then prove that: OI= |(bcos, (3alpha)/2)/(2sinalpha cos, alpha/2)|

Given an isosceles triangle with lateral side of length b, base angle alphalt pi/4, R,r the radii and O, I the centres of the circumcircle and incircle respectively, then prove that: r= (b sin 2alpha)/(2(1+cosalopha))

Draw an isosceles triangle in which each of the equal sides is of length 3 cm and the angle between them is 45^0dot

If the length of sides of right angled triangle are in AP, then their ratio is

If in an isosceles triangle with base 'a', vertical angle 20^@ and lateral side each of length 'b' is given then value of a^3+b^3 equals

A triangle has its sides in the ratio 4:5:6 , then the ratio of circumradius to the inradius of the triangle is

Find the cosine of the angle at the vertex of an isoceles triangle having the greatest area for the given constant length e of the median drawn to its lateral side.

A B C is an equilateral triangle of side 4c mdot If R ,r and h are the circumradius, inradius, and altitude, respectively, then (R+r)/h is equal to