1.

In Fig. 10.43, ABCD is a trapezium such that ABIDC Find 4D and cC andverity that sum of the four angles is 36040709Fig. 10.43

Answer»

AB || DC we have<A + <D = 180°

angle D= 180-40= 140also

<B + <C = 180°

angle c= 110



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