Einstein wrote a letter to Franklin Roosevelt because he wanted to warn America that Germany had the ability to build and use the atomic bomb which if exploded in a port, would destroy the entire port as well as some of the surrounding territory.
(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)
ABCD is a quadrilateral in which AD = BC and ∠ DAB = ∠ CBA (see Fig. 7.17). Prove that
(i) ∆ ABD ≅ ∆ BAC
(ii) BD = AC
(iii) ∠ ABD = ∠ BAC.
