Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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7.
8.
Transcribed Image Text:7. Fill in the following flowchart proof of the Triangle Sum Theorem.
Substitution
mz1 + mZ2+ m23 = 180°
mZA + mZ2+ mZC = 180
For lines, alt. Int. Zs =
m41 = mZA, m43 = m2C
Draw Line/through
B parallel to AC
1
3
Parallel Postulate
Given: AABC
Prove: mZA+m2+mZC3180*
Angle Addition, definition
of straight angle
8. REINFORCE In ACAT, m 2C = (15x)', m ZA = (5x + 40)*, and m T = (10x + 20). Find
the measures of each interior angle of ACAT.
HIFT Lock angle
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