# Chapter 2 - Section 2.1 - The Distance and Midpoint Formulas - 2.1 Assess Your Understanding: 20

$\sqrt5$ units.

#### Work Step by Step

RECALL: The distance $d$ between the points $(x_1, y_1)$ and $(x_2, y_2)$ can be found using the distance formula: $d = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$ Use the formula above to obtain: $d=\sqrt{(-2-0)^2+(1-0)^2} \\d=\sqrt{(-2)^2+1^2} \\d=\sqrt{4+1} \\d=\sqrt{5}$ Thus, the distance between the two given points is $\sqrt5$ units.

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