## Let the regular pyramid (S.ABCD) have height (a,,,AC = 2a) (refer to the figure below). Calculate the distance from the point (B) to the plane (left( {SCD} right)). – Math book

Make the pyramid even $$S.ABCD$$have height $$a,\,\,AC = 2a$$(refer to the figure below). Calculate distance from point $$B$$ to the plane $$\left( {SCD} \right)$$.