Question

In circle P, PA is a radius and AB is a tangent segment.

Which statement must be true?
1.PA=PB
2.PAB is an acute angle.
3.PA =BA
4.PAB is a right angle

Answer 1

Option 4.< PAB is a right angle.

Answer 2

we know that
if PA is a radius and AB is a tangent segment
then
the radius is perpendicular to AB
so
PA is perpendicular to AB
and
the m∠PAB=90°

therefore

the answer is the option
4.PAB is a right angle