goal: i can classify and calculate angles formed by parallel lines … · 2016. 9. 2. · geometry...
TRANSCRIPT
Geometry 2.5 Use Parallel Lines and Transversals
When sunlight enters a drop of rain, different colors of light leave the drop at different angles.
Goal: I can classify and calculate angles formed by parallel lines and transversals [G.CO.9]
Tiling Activity
Justify your answer.
Find the measure of the numbered angles. Justify your answer.
6.
21
100˚3
4
7.
8. Solve for x and y.
135o
(x – 30)o
y˚
9. Solve for x.
Assignment:
2.5 worksheet
If //, corresp. ∠s ≅
If //, alt. int. ∠s ≅If //, consecutive int. ∠s are supplementary
If //, alt. ext. ∠s ≅
Vert. ∠s ≅Linear Pairs are supplementary
Summary
Geo 2.5 wksht answers1. 65˚, If ||, then corr ∠s are ≅2. 71˚, If ||, then alt-int ∠s are ≅3. 63˚, If ||, then same- side int ∠s are supp.4. 120˚, If ||, then alt-ext ∠s are ≅5. 125˚, If ||, then linear pairs are supp.
6. 150˚; If ||, then corr ∠s are ≅ 150˚; vert ∠s are ≅
7. 122˚; If ||, then alt-int ∠s are ≅ 58˚; If ||, then same- side int ∠s are supp.
8. m∠1 = 90˚, m∠2 = 115˚ m∠3 = 65˚
9. m∠1 = 100˚, m∠2 = 80˚ m∠3 = 100˚
10. corresponding ∠s x = 7
11. same-side int ∠s x = 4
12. alt-int ∠s x = 8
13. alt-ext ∠s x = 6
14. linear pair x = 9
15. vertical ∠s x = 12
16. x = 145, y = 15 17. x = 20, y= 10