eBook
Math Planet

Math Planet: Algebra 1: Radical Expressions: The Distance and Midpoint Formulas

For Students 9th - 10th Standards
Distance and midpoint formulas are explained through the use of examples and a video lesson. [1:58]
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Khan Academy

Khan Academy: Distance of Complex Numbers

For Students 9th - 10th Standards
Given two complex numbers (either algebraically or graphically), find their distance. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
CK-12 Foundation

Ck 12: Geometry: Segments Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide reviews how to measure the distance between two points and the Ruler Postulate. It also introduces congruency/congruent segments and midpoint.

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