Question

which formula is used to calculate the distance between two points on a coordinate plane?
a. distance formula
b. slope formula
c. pythagorean theorem
d. midpoint formula
what is the missing side length of the following figure?

Explanation:

Step1: Recall distance - related formulas

The distance formula $d = \sqrt{(x_2 - x_1)^2+(y_2 - y_1)^2}$ is used to calculate the distance between two points $(x_1,y_1)$ and $(x_2,y_2)$ on a coordinate plane. The slope formula is for finding the slope of a line between two points, the Pythagorean theorem is for right - triangles in general, and the mid - point formula is for finding the mid - point between two points.

Answer:

A. Distance formula