2. Welcome to Interactive Chalkboard 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

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4. Contents Lesson 1-1Points, Lines, and Planes Lesson 1-2Linear Measure and Precision Lesson 1-3Distance and Midpoints Lesson 1-4Angle Measure Lesson 1-5Angle Relationships Lesson 1-6Polygons

5. Lesson 2 Contents OBJECTIVE: To computer with measures (2.9.8A) (M8.C.1) Example 1Length in Metric Units Example 2Length in Customary Units Example 3Precision Example 4Find Measurements Example 5Congruent Segments

6. Example 2-4a Find LM. Point M is between L and N. Sum of parts whole Substitution Subtract 2.6 from each side. Simplify. Answer: is 1.4 centimeters long. LM is the measure of.

7. XZ is the measure of. Example 2-4b Find XZ. Point Y is between X and Z. XZ can be found by adding XY and YZ. Sum of parts whole Substitution Add.

8. Example 2-4c Answer: is inches long.

9. Example 2-4d Substitute known values. Add 3 to each side. Divide each side by 12. Simplify. Find x and ST if T is between S and U, ST 7x, SU 45, and TU 5x – 3.

10. Example 2-4e Given Multiply. Answer:

11. Example 2-4f a. Find SE. Answer:in.

12. Example 2-4g b. Find ON. Answer: 3.7 cm

13. Example 2-4h c. Find a and AB if AB 4a + 10, BC 3a – 5, and AC 19. Answer:

14. Example 2-5a FONTS The Arial font is often used because it is easy to read. Study the word time shown in Arial type. Each letter can be broken into individual segments. The letter T would have two segments, a short horizontal segment, and a long vertical segment. Assume that all segments overlap when they meet. Which segments are congruent? TIME Answer: The five vertical segments in the letters T, I, M, and E are congruent. The four horizontal segments in T and E are congruent. The two diagonal segments in the letter M are congruent.

15. Example 2-5b LEISURE ACTIVITIES The graph shows the percent of adults who participated in selected activities. Suppose a segment was drawn along the height of each bar. Which categories would have segments that are congruent?

16. Example 2-5c Answer: The segments on the bars for going to museums and picnics would be congruent because they both have the same height, representing 16%. The segments on bars for going to the zoo and playing board games would be congruent because they have the same height, representing 14%.

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