geometry 2.1 name and classify angles · 2016. 9. 2. · september 20, 2017 geometry 2.1 name and...
TRANSCRIPT
September 20, 2017
Geometry 2.1Name and Classify Angles
Learning Target: I can name and classify the various types of angles as well as identify congruent
angles.[G.CO.1]
angle - consists of 2 different rays with the same endpoint.
C
AB
1
- the rays are the of the angle
- the endpoint is the of the angle
1.
How do we name an angle?
Write 4 names for the angle shown...
This is different!
September 20, 2017
Classifying angles (use the degrees)- there are 4 different kinds of angles
2. Name all the angles in the diagram. Tell whether each angle appears to be acute, obtuse, right or straight.
Angle Addition PostulateIf P is in the interior of ∠RST,
then
3.
Write an equation using the angle addition postulate.
Then find m∠ABD.
September 20, 2017
4. Given that m∠LKN = 145̊ find m∠LKM and m∠MKN.Write an equation and show your work!!
5. Given that m∠KLM is a straight angle, find m∠KLN.
Two angles are congruent if they have the same measure.
6. Identify all pairs of congruent angles in the diagram.
7. In the diagram, m∠P = 84˚, m∠PQR = 130˚, and m∠S = 121˚. Find the other angle measures in the diagram.
∠R ≅ _______
m∠R = _______
September 20, 2017
An angle bisector is a ray that divides an angle into two angles that are _______________.
8. In the diagram, YW bisects ∠XYZ, and m∠XYW = 18˚. Find m∠WYZ and m∠XYZ.
9. BD bisects ∠ABC. Find m∠ABD, m∠DBC and m∠ABC.
Write an equation and show your work!!
Exit Slip:
1.
Assignment: 2.1 worksheet
Angle Summary Activity
m∠EFH = _____ m∠HFG = _____
x = _____
September 20, 2017
2.1 Wksht answers1. ∠8, ∠Q, ∠NQT, ∠TQN Q QN, QT
2. ∠4, ∠D, ∠PDC, ∠CDP D DC, DP
3. ∠QRS acute ∠SRT right ∠QRT obtuse
4. straight 5. acute6. obtuse 7. right
8. ∠DCB right9. ∠FEA obtuse10. ∠BFC acute11. ∠BFD straight
12. 99˚ 13. 65˚ 14. 101˚
15. x = 25 16. x = 20 135˚ 55˚
17. 104˚ 18. 35.5˚ 52˚ 35.5˚
19. x = 20 20. x = 10 156˚ 80˚
21. will talk about in class