英文奥数求面积as the following picture shows ,the area of the isoce
英文奥数求面积
as the following picture shows ,the area of the isoceles triangle is 140 c㎡ ,the two equal sides are 20 cm each ,point on the third side at the random ,the length of the two vertical lines are acm and bcm .question:what length is "a+b"?
as the following picture shows ,the area of the isoceles triangle is 140 c㎡ ,the two equal sides are 20 cm each ,point on the third side at the random ,the length of the two vertical lines are acm and bcm .question:what length is "a+b"?
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