In a right triangle abc, angle c is a right angle and cos b =255/257.

what is the measure or angle a?

a)7.2 degrees

b)83.2 degrees

c)82.8 degrees

d)90.0 degrees

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

If angle 2=3x +1 and angle 3=2x +4what is angle 2

What numbers are included in the set of integers? what numbers are not included?