#8
There are 6 sides. 15 and 1/4 cm for each side, call it 15.25
15.25(6) = 91.50 or 91 1/2 centimeters
#9
[tex]19 \frac{11}{12} + 19 \frac{11}{12} = 38 \frac{22}{12} [/tex] simplify to get [tex]39 \frac{10}{12} [/tex]
Now do [tex]7 \frac{5}{12}+7 \frac{5}{12} = 14 \frac{10}{12} [/tex]
[tex]39 \frac{10}{12} + 14 \frac{10}{12} = 53 \frac{20}{12} [/tex] simplify to get your answer [tex]54 \frac{6}{12} or 54 \frac{1}{2} [/tex] feet
#10
5(2.5) = 12.5 square yards or 12 and 1/2 square yards
#11
2(0.25) = 0.5 square inches or 1/2 square inches
#12
3(7 and 1/10) which is the same 3(71/10) = 213/10 simplify to get 21 and 3/10 square centimeters
