Craig M.

asked • 01/17/14

GOAL: To verify the stability of a roof by using geometry to prove that two triangles are congruent.

  https://blendedschools.blackboard.com/bbcswebdav/pid-25771833-dt-content-rid-11790399_2/xid-11790399_2
 
OR TRY
https://blendedschools.blackboard.com/bbcswebdav/pid-25771833-dt-content-rid-11790399_2/courses/MA.09.GeometryA_conversion.bsn/Imported%20Content/Screen%20shot%202012-04-09%20at%201.29.39%20PM.png
 
Click on link to see the triangle.
------------------------------------------------



GOAL: To verify the stability of a roof by using geometry to prove that two triangles are congruent.



ROLE: You are the building inspector, with the job of inspecting the roof. The roof must pass inspection before the building can be used.



AUDIENCE: Sports and Entertainment for Youth, Inc. really hopes the building is ready for their grand opening that is scheduled for next week. This building is going to house an indoor sports and entertainment complex for high school students.



SITUATION: Use the information from the drawing of the roof and state your “Givens”. Then write a formal two-column proof, using the theorems and definitions of geometry learned in this unit to:



Prove that triangle ABC is congruent to triangle ADC.



Proving these triangles congruent will confirm the stability of the roof.



PERFORMANCE: State your givens from the drawing. Make statements in a two-column proof format in which each step has a correct justification. Nothing can be assumed unless it is “given” or “proven” using a theorem, postulate, or definition. The result should end in the undisputed proof that triangle ABC is congruent to triangle ADC. After completing this unit, YOU ARE READY to do this!

Emily B.

the links did not work for me.
Report

01/19/14

1 Expert Answer

By:

Joshua S. answered • 01/18/14

An Astrophysicist Who Teaches Just About Anything

Craig M.

This method seemed a lot more realistic and helped me a ton, Thank you so much! The triangle is two 40 degree angles w/ a split down the middle for a 90 degree angle
Report

01/19/14

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.