In ΔABC, if AB = 16 cm, BC = 12 cm and AC = 20 cm, then ΔABC is ______.

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In ΔABC, if AB = 16 cm, BC = 12 cm and AC = 20 cm, then ΔABC is right-angled. Explanation: AC is the longest side of ΔAВС. AB2 + BC2 = 162 + 122 = 256 + 144 = 400 = 202 = AC2 $\therefore$ $\angle$B = $90^\circ$ ...[By the converse of Pythagoras' theorem]

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