Construct ∆ PQR such that PQ + QR + PR = 12 cm. Angle Q = 80 ° & Angle R = 60 °. Write length of side QR.
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It is given that in ΔPQR,
PQ=QR=PR=5cm
Since all the sides of the given triangle are equal, therefore, the given triangle is an equilateral triangle.
Step-by-step explanation:
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