Document Sample

1.4 –Measure and Classify Angles & Angle Constructions Angle: Two different rays with the same initial point. Measured in degrees. B 1 A C A, BAC, CAB, 1 Common initial Vertex point, where pt. A rays meet vertex side AB The rays of Sides the angle AC side Point Pt. D is in D Interior inside an the interior Point angle of BAC Point Pt. E is in Exterior outside an the exterior Point angle of BAC E Angle more Acute than 0°, but mA = 50° less than 90° A Angle that Right measures 90° mR = 90° R Angle more Obtuse than 90°, but mO = 110° less than 180° O Angle that mS = 180° Straight measures 180° S Angle Bisector: Ray that cuts an angle in half to make 2 congruent angles P QS bisects PQR S PQS SQR mPQS = mSQR Q R Note: To name an angle use “ ”, but when stating its measure use “_______”. m Adjacent angles: Two angles that share a common side and vertex 2 1 1 is adjacent to 2 Angle Addition Postulate: If you add two adjacent angles, it totals to get their sum. A C B D mABC + mCBD = mABD 1. Give three names for the angle shown, then name the vertex and sides. Names Vertex Sides DEF Pt. E ED FED EF E 1. Give three names for the angle shown, then name the vertex and sides. Names Vertex Sides QVS VQ Pt. V SVQ VS V 2. Classify the angle as acute, right, obtuse or straight. mA = 115° obtuse 2. Classify the angle as acute, right, obtuse or straight. mA = 90° right 2. Classify the angle as acute, right, obtuse or straight. mA = 85° acute 2. Classify the angle as acute, right, obtuse or straight. mA = 180° straight 3. Use a protractor to find the measure of the angle to the nearest degree. Then classify the angle as acute, obtuse, straight, or right. 91° obtuse 3. Use a protractor to find the measure of the angle to the nearest degree. Then classify the angle as acute, obtuse, straight, or right. 32° acute 3. Use a protractor to find the measure of the angle to the nearest degree. Then classify the angle as acute, obtuse, straight, or right. 180° straight 4. Find the indicated measure. mPRS = 81+42 mPRS = 123° 4. Find the indicated measure. mWXZ = 90 – 26 = mWXZ = 64° mNRP + mPRQ = mNRQ 8x + 7 + 4x – 1 = 78 12x + 6 = 78 12x = 72 x=6 mPRQ = 4(6) – 1 mPRQ = 24 – 1 mPRQ = 23° mADB + mBDC = mADC 11x – 7 + 5x – 3 = 118 16x – 10 = 118 16x = 128 x=8 mADB = 11(8) – 7 mADB = 88 – 7 mADB = 81° 6. Find each indicated angle. 15° 90° 75° 90° 15° Find each indicated angle. 67° 106° 74° 157° a = 180-74 = 106° c = 180-90-23 = 67° b = 180-106 = 74° d = 180-23 = 157° 5x + 2 = 7x – 6 2 = 2x – 6 8 = 2x 4=x mABC = 5(4)+2 + 7(4)-6 = 20+2 +28-6 = 44° 5x + 13 = 9x – 23 13 = 4x – 23 36 = 4x 9=x mABC = 5(9)+13 + 9(9)-23 = 45+13+81-23 = 116° HW Problem Section Page # Assignment Spiral ?s 1.4 28-32 4-14 even, 21, 23-27 odd, 33-38, 40, 41 9-11 # 38 53° 37° **Bring compass and ruler tomorrow! Books will not be needed

DOCUMENT INFO

Shared By:

Categories:

Tags:
Recent Changes, how to, Private Label, web 2.0, Getting Started, United States, 21st century, Board of Directors, Crisis Management, one another

Stats:

views: | 4 |

posted: | 6/8/2011 |

language: | English |

pages: | 26 |

OTHER DOCS BY mikeholy

How are you planning on using Docstoc?
BUSINESS
PERSONAL

By registering with docstoc.com you agree to our
privacy policy and
terms of service, and to receive content and offer notifications.

Docstoc is the premier online destination to start and grow small businesses. It hosts the best quality and widest selection of professional documents (over 20 million) and resources including expert videos, articles and productivity tools to make every small business better.

Search or Browse for any specific document or resource you need for your business. Or explore our curated resources for Starting a Business, Growing a Business or for Professional Development.

Feel free to Contact Us with any questions you might have.