In an isosceles `DeltaABC` if the altitudes intersect on the inscribed circle, then find the secant of the vertical angle A.

In an isosceles A B C , the altitudes intersect on the inscribed circle then the cosine of the vertical angle ' A ' IS 1/9 (b) 1/3 (c) 2/3 (d) none

If an isosceles DeltaABC in which AB=AC=6cm is inscribed in a circle of radius 9 cm, find the area of the triangle.

An isosceles triangle with base 24 and legs 15 each is inscribed in a circle . Find the radius

If an isosceles triangle ABC in which AB=AC=6cm is inscribed in a circle of radius 9cm, find the area of the triangle.

In a regular pentagon ABCDE inscribed in a circle . Find the ratio between angle ADE and angle ADC.