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Railways PYQCBT 1 2020

RRB NTPC · Question 63

The base of an isosceles triangle in 8 cm and one of its equal sides is 5 cm. The height of the vertex opposite to the base from the base is:

  1. 3 cm

  2. 4 cm

  3. 2 cm

  4. 5 cm

Show answer & explanation

Answer: (A) 3 cm

Explanation

The height from the apex bisects the base: half-base = 4 cm, so height = √(5² − 4²) = 3 cm.