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Law of Sines:
sin(A)/a = sin(B)/b = sin (C)/c

Triangle ABC has measures a = 2, b = 2, and m∠A = 30°. What is the measure of angle B?

A. 15°
B. 30°
C. 45°
D. 60°

Respuesta :

caylus
Hello,

as sin A/a= sin B/b
==>(1/2)/2 =sin B/2
==>sin B=1/2
==>B=30° or 150°
But one say triangle ABC is not a plat triangle ==>150° is excluded.

Answer B: 30°

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