Question

Which triangle can be solved using the law of sines?

Answer 1

Answer:

The triangle C

Step-by-step explanation:

As we know:  

The Law of Sines (or Sine Rule) is very useful for solving triangles:

$\frac{a}{SinA} = \frac{b}{SinB} = \frac{c}{SinC}$  

where:

• a, b and c are sides.
• A, B and C are angles

Let analyse 3 answers:

a. Wrong, because we do not know the measure of each angle

b. Wrong, we do not the the lenght of side that is opposite the the angle 40°

c. True, we know the measure of the other missing angle is:

= 180° - 70°- 30°

= 80°

and we know one side is: 10m

Hence, using the Sine Law, we can find out the side of the other 2 sides of the triangles.

Answer 2

Answer:

D (the one with the 70 and 30 angles)

Step-by-step explanation:

edge 2020