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Mathematics
Problem
From an external point P, two tangents PA and PB are drawn to a circle with centre O. Which relation between the lengths PA and PB is always true? a)
P
A
+
P
B
=
2
r
PA + PB = 2r
P
A
+
P
B
=
2
r
b)
P
A
×
P
B
=
r
2
PA \times PB = r^{2}
P
A
×
P
B
=
r
2
c)
P
A
=
P
B
PA = PB
P
A
=
P
B
d)
P
A
>
P
B
PA > PB
P
A
>
P
B
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