Step-by-step explanation:
the distance between 2 points is the Hypotenuse of a right-angled triangle with the legs being the x coordinate difference and the y coordinate difference.
so, Pythagoras applies.
c² = a² + b²
distance² = (2 - -7)² + (11 - 9)² = 9² + 2² = 81 + 4 = 85
distance = sqrt(85) = 9.219544457... ≈ 9.2
