How do you find the bisector of an angle

STEPS:

Place compass point on the vertex of the angle (point B).

Stretch the compass to any length that will stay ON the angle.

Swing an arc so the pencil crosses both sides (rays) of the given angle. ...

Place the compass point on one of these new intersection points on the sides of the angle.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.