## Ammarah 2 years ago Determine whether AB is tangent to C. Explain ur reasoning..

1. Ammarah

|dw:1361850986588:dw|

2. Ammarah

@Mertsj

3. Mertsj

It doesn't even look like AB is a tangent in your picture.

4. Ammarah

oops i drew it wrong

5. Ammarah

|dw:1361851236697:dw|

6. Ammarah

its labeled the same way above..

7. Mertsj

|dw:1361851252740:dw|

8. Mertsj

Like that?

9. Ammarah

yeah

10. Mertsj

Ok. We know that a radius is perpendicular to a tangent at the point of tangency. Sp we want to know if the radius CB is perpendicular to the proposed tangent AB. We can use the Pythagorean Theorem to find out if ABC is a right triangle. Is it?

11. Ammarah

yes

12. Mertsj

So then, CB is perpendicular to AB and CB is a radius so AB must be a tangent.

13. Ammarah

ohhk i have a nother question can u please check it??

14. Ammarah

|dw:1361852047516:dw|

15. Ammarah

ANd my other Question is: |dw:1361852453452:dw|

16. Mertsj

|dw:1361852705443:dw|

17. Mertsj

|dw:1361852868718:dw|