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Mathematics 7 Online
OpenStudy (anonymous):

Γ is a circle with center O. AB and CD are 2 parallel chords of Γ such that AB=182 and CD=120. E and F are points on AB and CD, respectively, such that ∠OEA=∠OFC=90∘. If E lies between O and F and the radius of Γ is 109, what is the length of EF

OpenStudy (irishboy123):

do you know how to use pythagoreas theorem?

OpenStudy (anonymous):

no plzzzzzzz say th answer

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