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Glencoe Geometry Interactive Chalkboard Copyright © by The McGraw-Hill Companies, Inc. Developed by FSCreations, Inc., Cincinnati, Ohio 45202 Send all inquiries to: GLENCOE DIVISION Glencoe/McGraw-Hill 8787 Orion Place Columbus, Ohio 43240 Lesson 1-1 Points, Lines, and Planes Lesson 1-2 Linear Measure and Precision Lesson 1-3 Distance and Midpoints Lesson 1-4 Angle Measure Lesson 1-5 Angle Relationships Lesson 1-6 Polygons Example 1 Identify Angle Pairs Example 2 Angle Measure Example 3 Perpendicular Lines Example 4 Interpret Figures Name two angles that form a linear pair. A linear pair is a pair of adjacent angles whose noncommon sides are opposite rays. Answer: The angle pairs that satisfy this definition are Name two acute vertical angles. There are four acute angles shown. There is one pair of vertical angles. Answer: The acute vertical angles are VZY and XZW. Name an angle pair that satisfies each condition. a. two acute vertical angles Answer: BAC and FAE, CAD and NAF, or BAD and NAE b. two adjacent angles whose sum is less than 90 Answer: BAC and CAD or EAF and FAN ALGEBRA Find the measures of two supplementary angles if the measure of one angle is 6 less than five times the other angle. Explore The problem relates the measures of two supplementary angles. You know that the sum of the measures of supplementary angles is 180. Plan Draw two figures to represent the angles. Let the measure of one angle be x. Solve Given Simplify. Add 6 to each side. Divide each side by 6. Use the value of x to find each angle measure. Examine Add the angle measures to verify that the angles are supplementary. Answer: 31, 149 ALGEBRA Find the measures of two complementary angles if one angle measures six degrees less than five times the measure of the other. Answer: 16, 74 Click the mouse button or press the Space Bar to display the answers. End of Custom Shows WARNING! Do Not Remove This slide is intentionally blank and is set to auto-advance to end custom shows and return to the main presentation.