اﻟﻘﻄﻊ اﻟﻤﺘﻮﺳﻄﺔ ﻓﻲ اﻟﻤﺜﻠﺚ ﺗﺘﻼﻗﻰ ﻓﻲ ﻧﻘﻄﮫ واﺣﺪه ﺗﻘﺴﻢ ﻛﻼ ﻣﻨﮭﺎ ﺑﻨﺴﺒﮫ 2:1ﻣﻦ ﺟﮭﮫ اﻟﺮاس. ﻣﺜﻼ :ﻓﻲ اﻟﺸﻜﻞ اﻟﻤﻘﺎﺑﻞ 3 =DMﺳﻢ 9 =DCﺳﻢ 8 =AMﺳﻢ 12 =AEﺳﻢ