Question

. If two angles of a triangle are 40° and 80°,
then third angle is
(a) 90°
(b) 80°
(c) 60°
(d) 45°​

Answer 1

Answer:

80+40=120

we know that sum of angles of triangle are 180(angle sum)

80+40+x=180

x=60

Answer 2

Heya! here is your answer

x+40∘+80∘=180∘

x+120∘=180∘

x=180∘−120∘

x=60∘ (Option C)

Hope you get it!