John uses a ruler, on which the distance between 2 successive markings is 1mm,to measure the sides of triangle ABC,obtaining
AB=5.1 cm,BC=4.9cm,AC=2.7cm
I f he uses these measured lengths to find the perimeter of this triangle,find the accumulated error in the result obtained.
Maths question(10)??
2007-02-24 11:29 pm
回答 (1)
2007-02-25 3:42 am
✔ 最佳答案
the range of actural length of AB is 5.05-5.15, max. error=5.1-5.05 or 5.15-5.1=0.05cm=0.5mmSame max. error for BC and AC.
Perimeter=AB+AC+BC, accumulated error of perimeter=0.5*3=1.5mm
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