Answer:
see explanation
Step-by-step explanation:
If AB is a tangent then ∠ ABC = 90° and Δ ABC is right
Using the converse of Pythagoras' identity
If the square of the longest side is equal to the sum of the squares on the other 2 sides.
15 is the longest side and 15² = 225
9² + 12² = 81 + 144 = 225
Thus Δ ABC is a right triangle at B
Thus AB is a tangent to the circle at B
The answer is 492.307
The number after the thousandths is 9 - greater than 5 - so we round 6 up to 7.
We can know from the pic
2x+38=90
so, x=26
8 mins
1 mile
1 hr and 12 mins
