If ΔABC ~ ΔQEP , AB = 18 cm and BC = 15 cm then PR = ?

Two isosceles triangles have their corresponding angles equal and their areas are in the ratio 25: 36. The ratio of their corresponding heights is

The line segments joining the midpoints of the sides of a triangle form four triangles, each of which is

In the given figure, O is the point of intersection of two chords AB and CD such that OB = OD and ∠AOC = 45°. Then, ∠OAC and ΔODB are

In an isosceles ΔABC, if AC = BC and AB² = 2AC² then ∠C = ?