In the above figure, ACB is a right-angled triangle. CD is the altitude. Circles are inscribed within the triangles \( \triangle ACD \) and \( \triangle ABC \). P and Q are the centres of the circles. The distance PQ is
In the diagram, the lines QR and ST are parallel to each other. The shortest distance between these two lines is half the shortest distance between the point P and the line QR. What is the ratio of the area of the triangle PST to the area of the trapezium SQRT?
Note: The figure shown is representative
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD.