CK12 - Geometry

Use the diagrambelowfor questions8-13.(Note )

8. _____.Why?


9. _____.Why?


10. _____.Why?


11. _____.Why?


12. _____.Why?


13. _____.Why?


14. Provethe RemoteExteriorAngleTheorem:The measureof an exterioranglein a triangleequalsthe
    sum of the measuresof the remoteinteriorangles.To get started,you may use the following:Giventriangle

as in the diagrambelow, prove.

Answers

1. [Diff: 1]


2. [Diff: 1]


3. [Diff: 1]


4. [Diff: 1]


5. [Diff: 2]


6. and are complementary. Sincethe measuresof the threeanglesof the trianglemust

add up to we can use the fact that is a right angle to conclude that

[Diff: 2].