Answer: 12/4 or 3 miles
Step-by-step explanation:
The angle between the two tangents drawn from an external point to a circle and the angle subtended by the line segment joining the points of the contact at the Centre are supplymentary,
So,
15.) let the unknown angle be x
=》x + 55° = 180°
=》x = 180° - 55°
=》
16. let the unknown angle be n
=》n + 80° = 180°
=》n = 180° - 80°
=》
The answer to your questions is 90
- 9x - 12 = 8 - 4x
- 9x - 12 (+ 12) = 8 (+ 12) - 4x
- 9x = 20 - 4x
- 9x (+ 4x) = 20 - 4x (+ 4x)
- 5x = 20
- 5x (/ - 5) = 20 (/ - 5)
x = - 4
I hope this helps :)