Question

Find the surface area of each figure. Round your answer to the nearest hundredth if necessary. NO LINKS!!! Part 2b. ​

Answer 1

8. 272 m²

10. 306.9 km²

12. 311.4 m²

Explanation:

8. the surface area =

(10×10)+(4×½×10× 8.6)

= 100 + 172 = 272 m²

10. the surface area =

(11×7)+(2×½×7×13.2)+(2×½×11×12.5)

= 77+92.4+137.5= 306.9 km²

12. the surface area =

(9×9) +(4×½×9×12.8)

= 81+230.4 = 311.4 m²