Construct a ΔPQR, right-angled at R, hypotenuse is 5 cm and one of its adjacent sides is 4 cm.
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other side should be
5×5 - 4×4 = THIRD SIDE (PYTHAGORAS THEROYM)
25 - 16 = 19
THEREFORE THIRD SIDE = SQUARE ROOT OF 19
=4.35cm
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