question_answer 13)

                Verify Euler's formula for these solids.                  

Answer:

                (i) \[F=7\] \[V=10\] \[E=15\] \[F+V=7+10=17\] \[E+2=15+2=17\] So, \[F+V=E+2\] Hence, Euler's Formula is verified. (ii) \[F=9\] \[V=9\] \[E=16\] \[F+V=9+9=18\] \[E+2=16+2=18\] So, \[F+V=E+2\] Hence, Euler's Formula is verified.