Step 2: The third-angle theorem a) Drivers of semitrucks and other large vehicles pay close attention to signs similar to the one below. These signs indicate a change in the grade or slope of the road. Look at the black scalene triangle in the sign. How can the third-angle theorem be applied to find all three angle measurements in the black triangle? 10% 1B 60° b) Are the black triangles above congruent or similar? Explain. 90° D

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Step 2: The third-angle theorem
a) Drivers of semitrucks and other large vehicles pay close attention to signs similar to
the one below. These signs indicate a change in the grade or slope of the road. Look
at the black scalene triangle in the sign. How can the third-angle theorem be applied
to find all three angle measurements in the black triangle?
10%
#18
60°
b) Are the black triangles above congruent or similar? Explain.
90°
D
Transcribed Image Text:Step 2: The third-angle theorem a) Drivers of semitrucks and other large vehicles pay close attention to signs similar to the one below. These signs indicate a change in the grade or slope of the road. Look at the black scalene triangle in the sign. How can the third-angle theorem be applied to find all three angle measurements in the black triangle? 10% #18 60° b) Are the black triangles above congruent or similar? Explain. 90° D
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