In the figure, GHIJKLMN is a cube of side a. Find the length of HN.

Assessment: JAMB UTME - Mathematics - 1985 Subject: General Mathematics

Question 1 Report

In the figure, GHIJKLMN is a cube of side a. Find the length of HN.

Answer Details
HJ2 = a2 + a2 = 2a2

HJ =  2 a 2 = a 2

HN2 = a2 + (a 2 )2 = a2 + 2a2 = 3a2

HN =  3 a 2

= a 3 cm

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