Tangent at P to the circumcircle of triangle PQR is drawn. If this tangent is parallel to side QR show that `Delta PQR` is isosceles.

The Circumcircle of the triangle formed by any three tangents to a parabola passes through

If the bisector of the exterior vertical angle of a triangle be parallel to the base. Show that the triangle is isosceles.

If the bisector of the exterior vertical angle of a triangle be parallel to the base. Show that the triangle is isosceles.

The tangent at any point P onthe parabola y^2=4a x intersects the y-axis at Qdot Then tangent to the circumcircle of triangle P Q S(S is the focus) at Q is a line parallel to x-axis y-axis a line parallel to y-axis (d) none of these

The tangent to the circumcircle of an isosceles DeltaABC at A, in which AB= AC, is parallel to BC.

Tangents are drawn to the In -circle of triangle ABC which are prallel to its sides. If x,y,z be the lengths of the tangents and a,b,c be the sides of triangle, then prove that x/a+y/b+z/c=1

The measure of angle angle QPR is 90 degrees, and the area of triangle PQR is 6. If triangle PQR is rotated 360^(@) about side PR, what is the total surface area of the resulting solid ?

A point P is given on the circumference of a circle of radius r. Chord QR is parallel to the tangent at P. Determine the maximum possible area of the triangle PQR.

If the radius of the circumcircle of the isosceles triangle ABC is equal to AB(=AC), then the angle A is equal to-

In a triangle PQR, QR = PR and angleP=36^(@) . Which is the largest side of the triangle ?