Question: abcd is a rectangle in which diagonal ac bisects angle a as well as angle c so that abcd is a square?
Answer: Given: ABCD is a rectangle in which diagonal AC bisects ∠A as well as ∠C. To Prove: (i) ABCD is a square. (ii) diagonal BD bisects ∠B as well as ∠D. and transversal AC intersects them.