Question

In a quadritateral \( A B C D , A B = 7 \mathrm { cm } , B C = 6 \mathrm { cm } , \) \( C D = 12 \mathrm { cm } , D A = 15 \mathrm { cm } , A C = 9 \mathrm { cm } . \) Find its area.I \( \begin{array} { l l l } { \text { (A) } ( 10 \sqrt { 34 } + 54 ) \mathrm { cm } ^ { 2 } } & { \text { (B) } ( 10 \sqrt { 34 } - 54 ) \mathrm { cm } ^ { \prime } \mathrm { c } } & { \text { a } 1 } \\ { \text { (C) data insutticient } } & { \text { (D) none of these } } \end{array} \) What is the measure of \( - A D C \), it \( | \mathbf { B C } | = | A D | ? \)

Answer 1