Question

If two angles of a triangle are 45° and 65°, then its third angle is
a) 70°
b) 105
c) 65
d) 75​

Answer 1

Answer:

c) 65°

hope it will be helpful

Answer 2

Answer:

let the Third angle Be "x"

We know , Sum of all angles of Triangle is 180°

So,

$\begin{gathered}:\implies\sf{ 45° + 65° + x° = 180° } \\ \\ \\ :\implies\sf{ 110° + x° = 180°} \\ \\ \\ :\implies\sf{ x = 180° - 110°} \\ \\ \\ :\implies\sf{ x = 70°} \end{gathered}$

Therefore, Measure of Third angle is 70°