Question

two angles of the triangles are 54,66 find the third angle​

Answer 1

Step-by-step explanation:

let the unknown angle be x.

54 + 66 + x = 180°

120 + x = 180°

x = 180 - 120

x = 60°

therefore, the 3rd angle = 60°

Answer 2

Step-by-step explanation:

Total angle in triangle = 180°

first angle = 54°

second angle = 66

third angle = 180 - ( 54+66 )°

= 180 - 120°

= 60°