1. HourglassMage

2. HourglassMage

Calculate the value of OK.

3. HourglassMage

I think I know how to solve it, but I don't know if they put the 12.75 in there to trick me or if I'm actually supposed to use it in my equation.

4. ganeshie8

just setup a proportion

5. ganeshie8

yes, 12.75 is just there to trick u

6. HourglassMage

Do I use 12.75 to set up a proportion for the two areas, though (which solving would be more difficult in my opinion), or should I simply set up a proportion for 17 and 4 to figure out the length of OK

7. HourglassMage

OK< thnx

8. HourglassMage

So...my proportion should look like this: 17/4 = OK/2

9. HourglassMage

Right?

10. ganeshie8

assuming the trapezoids are similar, u can setup a proportion of corresponding sides

11. ganeshie8

$$\large \frac{OK}{2} = \frac{17}{4}$$

12. ganeshie8

Correct ! solve $$OK$$

13. HourglassMage

Or that, yeah you can switch the sides. Thnx for your help!

14. HourglassMage

OK = 8.5

15. ganeshie8

8.5 is $$\large \color{red}{\checkmark}$$

16. ganeshie8

u wlc :)

17. VALERIAN34

Good old thales.