如图,已知正方形ABCD的边长为10厘米,E为AD中点,F为CE中点,G为BF中点,则△BDG的面积为_平方厘米.
如图,已知正方形ABCD的边长为10厘米,E为AD中点,F为CE中点,G为BF中点,则△BDG的面积为______平方厘米.
数学人气:971 ℃时间:2019-10-19 07:10:43
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连接DF、BE,∵正方形ABCD的边长为10厘米,∴S正方形ABCD=10×10=100cm2,∴S△BDC=12×10cm×10cm=50cm2,S△BEC=12S正方形ABCD=50cm2,又∵E为AD中点,∴DE=5cm,∴S△DEC=12×5cm×10cm=25cm2,∵F为CE中点,∴S...
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