Einstein called his desk drawer at the patent office the ‘bureau of theoretical physics’ because he was working as a technical expert in the patent office in Bern where he was supposed to be assessing other peoples’ inventions. The drawer was the place were he used to store his secretly developed ideas.
(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.
