(i) Einstein’s equation – 9
(ii) Einstein meets his future wife – 7
(iii) The making of a violinist – 3
(iv) Mileva and Einstein’s mother – 10
(v) A letter that launched the arms race – 15
(vi) A desk drawer full of ideas – 8
(vii) Marriage and divorce – 11
(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.
