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[" THEOREM "5" Prove that the sum of the...

[" THEOREM "5" Prove that the sum of the angles in the four segments exterior to a "],[" cyclic quadrilateral is equal to six right angles."],[" GIVEN A cyclic quadrilateral "ABCD," and "/_P,/_Q,],[/_R" and "/_S" are in the four segments exterior to it."],[" TOPROVE "/_P+/_Q+/_R+/_S=6" rt."&" ."],[" CONSTRUCTION Join BS and CS."],[" PROOF "APBS" is a cyclic quadrilateral."],[:.quad /_1+/_P=180^(@).]

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