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Question

If area of a triangular piece of cardboard is 90cm2, then the length of altitude corresponding to 20cmlong base is ____ cm.


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Solution

Solve for length of the altitude:

Given,

  1. Area of a triangular piece of cardboard is 90cm2,
  2. Length of the base is 20cm

Area of triangle =12× base × height

90=12×20× height

Height =2×9020=9cm.

Hence the length of the altitude is 9cm.


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