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Mathematics 8 Online
OpenStudy (anonymous):

Geometry help

OpenStudy (anonymous):

OpenStudy (anonymous):

I would say its a

OpenStudy (anonymous):

do Pythagorean theorem

OpenStudy (anonymous):

The tangent to a circle is perpendicular with the radius, meaning angle B = 90 degrees. You have a right angle triangle and the length of two sides, so use pythagoras' theorem to find the length of the third side, the radius.

OpenStudy (anonymous):

@LizzyLove<3 yeah

OpenStudy (anonymous):

:)

OpenStudy (anonymous):

a^2 + b^2 =c^2

OpenStudy (anonymous):

yupp

OpenStudy (anonymous):

7^2 + 8.9^2=c^2= 128.21= 11.2

OpenStudy (anonymous):

nope @vivianrush

OpenStudy (anonymous):

in your case c=AO,b=r, a=AB, so r^2=AO^2 -AB^2 ,then sqrt the result

OpenStudy (anonymous):

im so confused now.

OpenStudy (anonymous):

r^2=AO^2 -AB^2 ,then sqrt the result

OpenStudy (anonymous):

hurry what you get ?

OpenStudy (anonymous):

8.9^2 - 7^2=30.21= 5.49 = 5.5

OpenStudy (anonymous):

Well done

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