Question

*In ∆PQR if m∠P=30°, m∠Q=30° then m∠R = ?* 1️⃣ 30° 2️⃣ 60° 3️⃣ 120° 4️⃣ 150°​

Answer 1

Answer:

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Answer 2

Answer:

3) 120°

Step-by-step explanation:

∵ The sum of all interior angles of triangle = 180°

∴ m∠R = 180 - (m∠P + m∠Q)

m∠R = 180 - (30 + 30)

m∠R = 180 - 60

m∠R = 120°

Or

The sum of all interior angles of triangle = 180°

30 + 30 + x = 180

60 + x = 180

x = 180 - 60

x = 120°