## katlin95 2 years ago find the surface area of the figure. A. 19.21 cm^2 B. 10.37 cm^2 C. 34.85 cm^2 D. 6.29 cm^2

1. katlin95

2. katlin95

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3. katlin95

sorry this is a very bad drawing,, but can I please get some help?

4. katlin95

@e.cociuba

5. jim_thompson5910

same ideas as last time where we did this one http://openstudy.com/study#/updates/515a3840e4b07077e0c11e44 the only difference is that the numbers are changed

6. katlin95

can you give me the solution to solve?

7. jim_thompson5910

what's the area of the base

8. katlin95

1.7

9. katlin95

or 3.4

10. jim_thompson5910

1.7 is the length of the side of the square

11. jim_thompson5910

(1.7)^2 = ???

12. katlin95

2.89

13. jim_thompson5910

what is the area of each triangular piece

14. katlin95

8.29?

15. jim_thompson5910

how did you get that?

16. katlin95

17. jim_thompson5910

Area of triangle A = (b*h)/2 A = (4.8*1.7)/2 A = ???

18. jim_thompson5910

I recommend writing down each area and perimeter formula on a note sheet so you can look them up quickly

19. katlin95

4.08

20. jim_thompson5910

good, now multiply that by 4 afterwards, add that to 2.89

21. katlin95

19.21

22. jim_thompson5910

perfect

23. katlin95

yay!

24. jim_thompson5910

you got 16.32 for the lateral surface area 2.89 was the base area

25. katlin95

ohh okai

26. jim_thompson5910

so total surface area = base area + lateral surface area total surface area = 2.89 + 16.32 just summing things up (you probably already know by now)

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