1.

In a triangle ABC, ∠BAC=90∘; AD is the altitude from A on to BC. Draw DE perpendicular to AC and DF perpendicular to AB. Suppose AB=15 and BC=25. Then the length of EF is

Answer»

In a triangle ABC, BAC=90; AD is the altitude from A on to BC. Draw DE perpendicular to AC and DF perpendicular to AB. Suppose AB=15 and BC=25. Then the length of EF is



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