Apply the Pythagorean Theorem to find the length between the two points. Round your answer to the nearest hundredth.

(6,9)

(2,1)

1 answer

The Pythagorean Theorem is used to calculate the distance between two points in a Cartesian coordinate system. Let's denote the two points as P1(x1, y1) and P2(x2, y2).

P1 = (6, 9)
P2 = (2, 1)

To use the Pythagorean Theorem to find the distance (d) between these two points, we will calculate the differences in the x-coordinates (Δx) and y-coordinates (Δy), and then apply the theorem:

Δx = x2 - x1 = 2 - 6 = -4
Δy = y2 - y1 = 1 - 9 = -8

Next, we square those differences and sum them up:

Δx² = (-4)² = 16
Δy² = (-8)² = 64

Summing these we get:

Δx² + Δy² = 16 + 64 = 80

Now we take the square root of that sum to find the distance:

d = √(Δx² + Δy²)
d = √80
d ≈ 8.94

Rounding to the nearest hundredth, the distance between the two points is approximately 8.94 units.