JefD9esshanRmay JefD9esshanRmay

15-05-2016
Mathematics

Answered

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?

A15°
B30°
C45°
D60°

Verified Answer :

21-05-2016

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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