Get premium membership and access revision papers with marking schemes, video lessons and live classes.

Processing. Please wait.

Calculating angle between two planes

Answer Text:
Any two planes are either parallel or intersect in a straight line. The angle between two planes is the angle between two lines, one
on each plane, which is perpendicular to the line of intersection at the point

Example:
The figure below PQRS is a regular tetrahedron of side 4 cm and M is the mid point of RS;

Calculate the angle between planes PSR and QRS.