sarah1911
19.08.2019 •
Mathematics
Proving the sum of the interior angle measures of a
triangle is 180°
try it
given: y ||z
prove: m25+ m2 2 + m26 = 180°
angles lines statements reasons
23
25
26
m21
m23
m25
m26
y
statements
reasons
6
7 z
demo
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