## anonymous one year ago Find the area of the triangle. Round the answer to the nearest tenth. A. 68.4 square units B. 75.3 square units C. 84.5 square units D. 136.7 square units

1. anonymous

2. geerky42

Do you know trigonometry?

3. anonymous

no

4. anonymous

not really

5. anonymous

@geerky42 can you help me tho solve using trig thats the category im on

6. anonymous

"Trigonometric Area Formulas"

7. geerky42

So there are area formulas you can use? Can you tell me these formulas?

8. anonymous

they arent any on this question thats what i need

9. geerky42

Ok let's find height. |dw:1437442631416:dw| Do you know how? HINT: $$\sin\theta = \dfrac{\text{Opp}}{\text{Hyp}}$$

10. anonymous

what does that symbol next to sin mean

11. UsukiDoll

theta

12. geerky42

We have angle $$63^\text o$$, so opposite side is h and hypotenuse side is 13.

13. geerky42

Common way to denote angle.

14. anonymous

now what

15. geerky42

Well, plug in values and solve for $$h$$.

16. anonymous

um i got 4.8

17. geerky42

How?

18. anonymous

what do i plug in for H

19. geerky42

Nothing. You are solving for h. $$\sin\theta = \dfrac{Opp}{Hyp}$$ You are given that $$\theta = 63^\text o$$ and $$Hyp = 13$$ You are trying to find height aka opposite side.

20. anonymous

ok now i got 11.4

21. anonymous

sin(63)=h/13

22. geerky42

Yep. Now you have height. However we need base. We have hypotenuse and opposite side, so we can use Pythagorean Theorem here to find adjacent side.

23. geerky42

|dw:1437443448625:dw|

24. anonymous

126?

25. anonymous

A. Refer to the attachment.