Observe the above figure and answer the question.
The length of AB is:
Answer & explanation
Correct answer: option 4
In Δ ADC, \(\angle\)D =90°
By using pythagoras theorem:
AC2 = AD2 + DC2
AC2 = 62 + 82 = 36 + 64 = 100
AC = 10 cm
In Δ ACB, \(\angle\)C =90°
By using pythagoras theorem:
AB2 = AC2 + CB2
AB2 = 102 + 72 = 100 + 49 = 149
AB = \(\sqrt {149}\) cm