Question

1) In ∆PQR, PQ=PR and ∠P=40° then ∠Q=

Answer 1

Step-by-step explanation:

Given that PQ=PR then ∠R=∠Q=x

∠P+∠Q+∠R=180∘

x+x+40∘

=180∘

x=70∘

∠R=∠Q=70∘

Answer 2

Answer:

<Q=70°

Step-by-step explanation:

<P + (<Q+<R) = 180° (Angle Q and R have the same angle)

40 + (2x) = 180°

2x=(180-40)

2x=140°

x=70°

Therefore <Q is 70°