Question

two angles of a triangle are 30 degree and 80 degree find the third angle

Answer 1

The sum of the interior angles of a triangle are equal to 180o. To find the third angle of a triangle when the other two angles are known subtract the number of degrees in the other two angles from 180o.

Answer 2

$\orange{hey \: mate}$

First Angle = 30°
Second Angle = 80°
Third Angle = x
30+80+x = 180°
110 + x = 180
x = 70°

$<marquee direction="left" > so the correct answer is 70 </marquee>$

$\bold \green{i \: hope \: it \: helps}$