## brianAC. What is the area of LMNO? (picture below) one year ago one year ago

1. brianAC.

|dw:1359688362043:dw|

2. geerky42

Find the height $$\overline{NP}$$ then use the formula $$A = bh$$

3. brianAC.

isnt the height 10?

4. geerky42

No, it's slant height. We want actual height.

5. brianAC.

damn i forgot how to find height i got all into other formulas

6. geerky42

Use Pythagorean Theorem. Ring any bells?

7. brianAC.

ohhh ok. give me a minute

8. brianAC.

so it would look like 19^2+10^2=8^2?

9. geerky42

No, here, let me show you. |dw:1359689637105:dw| Does this make sense?

10. geerky42

|dw:1359689823749:dw|

11. geerky42

Does this make sense?

12. brianAC.

yea

13. geerky42

So, what is h?

14. brianAC.

36

15. geerky42

You forgot to take square root of it. (√)

16. brianAC.

what u mean?

17. brianAC.

i think the height is 18 but im not sure

18. AccessDenied

$$h^2 + 8^2 = 10^2$$ <--We solve this for $$h$$. $$h^2 = 10^2 - 8^2$$ <-- Notice that we have that exponent of 2. We have to take the square root of both sides. $$h = \sqrt{10^2 - 8^2}$$ <-- This would be our value of h.

19. geerky42

Can you find the value of h yet?