If ABCD is a tetrahedron such that each `triangleABC, triangleABD and triangleACD
Channel: Doubtnut
Date: 2020-05-24

If ABCD is a tetrahedron such that each `triangleABC, triangleABD and triangleACD` has a right angle at A. If `ar(triangle(ABC))=k_1, ar(triangleABD)=k_2, ar(triangleBCD)=k_3`, then ar(triangleACD)` is