Question 2: In ∆ PQR, ∠ P = 70°, ∠ Q = 65 ° then find ∠ R.

Question 2:

In PQR, P = 70°Q = 65 ° then find  R.

In PQR,
∠P + ∠Q + ∠R = 180   (Angle sum property)
⇒ 70 + 65 + ∠R = 180         
⇒ 135 + ∠R = 180  
⇒ ∠R = 180 − 135  
= 45
Hence, the measure of  R is 45.

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