Question

solve this fast please​

Answer 1

Answer:

If PQ=PR then,angle Q=Angle R

so angle R=60

angle R+angle alpha=180 (linear pair)

alpha=120

Answer 2

Answer:

120

Step-by-step explanation:

In triangle pqr

pq = pr

angle q = 60

if opposite sides of a triangle are equal then the opposite angles are also equal

angle r = 60

angle r + angle alpha = 180

60 + alpha = 180

alpha = 180-60

          = 120

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