如图中有两个三角形,已知三角形DEF的面积是24.52平方分米,求三角形ABC的面积.
如图中有两个三角形,已知三角形DEF的面积是24.52平方分米,求三角形ABC的面积.
数学人气:180 ℃时间:2019-08-20 18:55:57
优质解答
过C点作DC⊥BC交BA的延长线与D,则
三角形ABC的面积为:
17.16×8÷2-24.52,
=17.16×4-24.52,
=68.64-24.52,
=44.12(平方分米).
答:三角形ABC的面积为44.12平方分米.
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