Q3 of 45 Page 43

In ΔPQR, PQ = 10 cm, QR = 12 cm, PR = 8 cm. Find out the greatest and the smallest angle of the triangle.

Given, in ΔPQR, PQ = 10 cm, QR = 12 cm, PR = 8 cm



We know, If two sides of a triangle are unequal, then the angle opposite to


the greater side is greater than angle opposite to the smaller side.


Here greater side is PQ and the smallest side is PR


∴ Angle opposite to QR = ∠QPR


Angle opposite to PR = ∠PQR


Greatest angle of triangle = ∠QPR


Smallest angle of triangle = ∠PQR


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