Dab tsi yog qhov cuam tshuam Arc? Yuav kom nco qab, ib qho arc yog ib feem ntawm qhov ncig ntawm lub voj voog. Ib qho kev cuam tshuam arc tuaj yeem txhais tau tias yog ib qho arc tsim thaum ib lossis ob qhov sib txawv chords lossis kab ntu txiav hla ib lub voj voog thiab sib ntsib ntawm ib qho chaw hu ua vertex.
Dab tsi yog qhov txawv ntawm inscribed thiab intercepted arc?
Ib lub kaum sab xis yog lub kaum sab xis nrog nws cov vertex ntawm lub voj voog thiab nws sab yog chords. Lub intercepted arc yog lub arc uas nyob rau hauv lub inscribed lub kaum sab xis thiab nws endpoints nyob rau ntawm lub kaum sab xis. … Cov kab ntawv sau uas cuam tshuam tib lub arc yog congruent.
Dab tsi yog qhov cuam tshuam me me arc?
Note: Lo lus "intercepted arc" yog hais txog an arc "txiav" lossis "dag ntawm" ob sab ntawm lub kaum ntse ntse. … Hauv daim duab ntawm sab xis, ∠AOB yog lub kaum sab xis nruab nrab nrog qhov cuam tshuam me me arc ntawm A mus rau B. m∠AOB=82º Nyob rau hauv ib lub voj voog, lossis cov voj voog sib txuam, cov kaum sab hauv nruab nrab muaj qhov sib txuam.
Puas cuam tshuam arc tib yam li qhov ntev arc?
Feem ntau tsis meej pem nrog kev ntsuas arc, qhov ntev arc yog qhov nrug ntawm qhov kawg ntawm lub voj voog. Arc ntsuas yog qhov ntsuas ntsuas, sib npaug rau lub hauv nruab nrab uas ua rau qhov cuam tshuam arc. … Txhawm rau piv qhov ntev ntawm qhov ntev thiab qhov ntsuas arc, cia peb saib qee lub voj voog loj.
Dab tsi yog cuam tshuam arc piv txwv?
Thaum ob kab ncaj hla iblub voj voog, ib feem ntawm lub voj voog ntawm cov ntsiab lus kev sib tshuam yog hu ua intercepted arc. … Piv txwv li, nyob rau hauv daim duab ntawm txoj cai, ob kab lus txiav tawm, los yog cuam tshuam, ob lub arcs, AB thiab CD.
