Question

two interior angle of 40 degree and 50 degree of triangle find the exterior angle

Answer 1

Answer:

90

Step-by-step explanation:

let the 3rd angle be x (inside the triangle)

then ...

40°+50°+x= 180° (angle sum property of ∆)

90° + x =180° .

x = 90°

NOW,

let the exterior angle be y ..

then,

90°+ y = 180° ( linear pair )

y= 90°