Proving the Sum of the Interior Angle Measures of a Triangle Is 180°
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Given: y || z
Prove: m25+ m2 2 + m 26 = 180°
Angles Lines Statements Reasons
21
23
VX
25
26
m21
m23
m 25
m26
L
A
M
1
2
3
Statements
y
Reasons
5
6
7
Z
B
Assemble the proof by dragging tiles to
the Statements and Reasons columns.

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