Answer:
x = 4
in
Explanation:
Given a tangent and a secant to the circle from an external point, then
The square of the tangent is equal to the product of the secant's external part and the entire secant, that is
x² = 4(4 + 8) = 4 × 12 = 48 ( take the square root of both sides )
x =
=
=
×
= 4
← exact value