Prove that for any value of angle i, rays `1 and 2` are parallel

The sides of an isosceles right prism are coated with a reflecting coating. A ray of light falls on the hypotenuse at an arbitrary angle i. For what value of i the ray leaving the prism is parallel to the incident ray ?

The sides of an isosceles right prism are coated with a reflecting coating. A ray of light falls on the hypotenuse at an arbitrary angle i. For what value of i the ray leaving the prism is parallel to the incident ray ?

Prove that two adjacent angles of any parallel side of an isoceles trapezium are equal.

A ray of light is incident on the interface between water and glass at an angle i and refracted parallel to the water surface, then value of mu_(g) will be

If two parallel lines are intersected by a transversal then prove that the bisectors of any pair of alternate interior angles are parallel.

Prove that the bisectors of the opposite angles of a parallelogram are parallel.

A transversal intersects two parallel lines. Prove that the bisectors of any pair of corresponding angles so formed are parallel.

A transversal intersects two parallel lines. Prove that the bisectors of any pair of corresponding angles so formed are parallel.