Answer:
45°
Step-by-step explanation:
3x + 4x + 5x = 180° **
12x = 180° / :12
x = 15°
m<A = 3×15 = 45°
** There is a law that the sum of all the angles in a triangle is equal to 180°
The answer for this question would be 10
Answers are below.
Hope this helps:)
235.24 + 45.58 = 280.82
280.82/2 = 140.41
each check was 140.41
