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Find the measure of GH.

Find The Measure Of GH class=

Sagot :

Answer:

D

Step-by-step explanation:

Given a tangent and a secant from an external point to the circle, then

The product of the external part and the whole secant is equal to the square of the tangent, that is

8(8 - 6 + 2x) = 12²

8(2 + 2x) = 144 ( divide both sides by 8 )

2 + 2x = 18 ( subtract 2 from both sides )

2x = 16 ( divide both sides by 2 )

x = 8

Then

GH = - 6 + 2x = - 6 + 2(8) = - 6 + 16 = 10 → D

Answer:

[tex]\textsf{GH=10}[/tex]

Step-by-step explanation:

[tex](EF)^{2} =FG(FH)[/tex]

[tex](12)^{2} =8(8-6+2x)[/tex]

[tex]144=8(2+2x)[/tex]

[tex]144=16+16x[/tex]

[tex]16x=144-16[/tex]

[tex]16x=128[/tex]

[tex]x=128/16=8[/tex]

So, [tex]GH=-6+2(8)=[/tex]

[tex]-6+16=[/tex]

[tex]=10[/tex]

[tex]\textsf{OAmalOHopeO}[/tex]