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
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![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](/uploads/image/z/3725983-55-3.jpg?t=%E8%8B%B1%E6%96%87%E5%A5%A5%E6%95%B0%E6%B1%82%E9%9D%A2%E7%A7%AFas+the+following+picture+shows+%2Cthe+area+of+the+isoceles+triangle+is+140+c%E3%8E%A1+%2Cthe+two+equal+sides+are+20+cm+each+%2Cpoint+on+the+third+side+at+the+random+%2Cthe+length+of+the+two+vertical+lines+are+acm+and+bcm+.question%3Awhat+length)
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
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"?
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
如图
(a+b)x20/2=140
a+b=14
20*a/2+20*b/2=140 ; a+b=14