Question

in a triangle ABC.a=120 dec and b=2angle c find the angle b and c​

Answer 1

We have,

∠A=120 ∘ and AB=AC⇒∠B=∠C

But, ∠A+∠B+∠C=180∘

∴120 ∘ +∠B+∠B=180 ∘

⇒2∠B=60 ∘

⇒∠B=30 ∘

⇒∠C=∠B=30 o

Answer 2

Step-by-step explanation:

<A +<B+<C = 180

120 +2 *c + c =180

3^c =180 -120

=60 =3^c

<c =60/3=20 degree

<B =20 *2 =40

angle B =40

angle C = 20

120 +40 +20 =180 degree

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