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Texas Instruments
Texas Instruments: Distance and Midpoint Formulas
Self checking using the attached LearningCheck .edc file. These six questions, maybe used for class warmup, review, or checking for understanding.
CK-12 Foundation
Ck 12: Geometry: Segments Study Guide
[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.