Question

in triangle ABC , <A=100,<B=45,then <C=
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Answer 1

Answer:

< A+ <B+<C = 180° ( angle sum prop)

/_C = 180 - 145

< C= 35°

Answer 2

Answer:

A + B +C = 180..........Angle sum property of triangle

Therefore, 100 + 45 + C =180

C = 180-145

C = 35