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प्रश्न
In ∆PQR, if ∠P = 60°, and ∠Q = 40°, then the exterior angle formed by producing QR is equal to ______.
पर्याय
60°
120°
100°
80°
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उत्तर
In ∆PQR, if ∠P = 60°, and ∠Q = 40°, then the exterior angle formed by producing QR is equal to 100°.
Explanation:
Let QR is produced to a point S.
In ∆POR, ∠PRS = ∠P + ∠Q ...[Exterior angle property]
∠PRS = 60° + 40° = 100°
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