Answer:
the branch of mathematics concerned with specific functions of angles and their application to calculations.
Step-by-step explanation:
the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.
65
y° = 7°
(8y +4) +(8y +4) +(8y +4)=180° ( Equilateral Triangle)
24y +12= 180°
24y= 180-12
y=7°
