Bell Ringer do 1-4 only on your BR sheet.

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Presentation transcript:

Bell Ringer do 1-4 only on your BR sheet. Then do p. 41 1-4 in your notes Then take out your notes and bisect a segment AB using your compass and protractor. Turn in all packets, progress reports and missing assignment

Answer: 180 > mWYT > 90, so WYT is an obtuse angle. Measure and Classify Angles Answer: 180 > mWYT > 90, so WYT is an obtuse angle. Example 2

Measure and Classify Angles Example 2

A. Measure CZD and classify it as right, acute, or obtuse. A. 30°, acute B. 30°, obtuse C. 150°, acute D. 150°, obtuse Example 2a

B. Measure CZE and classify it as right, acute, or obtuse. Example 2b

C. Measure DZX and classify it as right, acute, or obtuse. Example 2c

Measure and Classify Angles INTERIOR DESIGN Wall stickers of standard shapes are often used to provide a stimulating environment for a young child’s room. A five-pointed star sticker is shown with vertices labeled. Find mGBH and mHCI if GBH  HCI, mGBH = 2x + 5, and mHCI = 3x – 10. Example 3

mGBH = mHCI Definition of congruent angles Measure and Classify Angles Step 1 Solve for x. GBH  HCI Given mGBH = mHCI Definition of congruent angles 2x + 5 = 3x – 10 Substitution 2x + 15 = 3x Add 10 to each side. 15 = x Subtract 2x from each side. Example 3

Step 2 Use the value of x to find the measure of either angle. Measure and Classify Angles Step 2 Use the value of x to find the measure of either angle. . Answer: mGBH = 35, mHCI = 35 Example 3

Find mBHC and mDJE if BHC  DJE, mBHC = 4x + 5, and mDJE = 3x + 30. Example 3

Class Assignment p. 41-44 1-6, 9-10, 32, 47, 51, 54, 56, 65, 74-75

Copy an angle (p. 39)