# Sine Law

## Interactive practice questions

Consider a triangle where all three sides are known, but no angles are known. Is there enough information to find all the angles in the triangle using only the sine rule?

No

A

Yes

B

No

A

Yes

B
Easy
Less than a minute

Find the side length $a$a using the sine rule.

Find the length of side $a$a using the Sine Rule.

Find the value of the acute angle $x$x using the sine rule.

### Outcomes

#### 10D.T3.01

Explore the development of the sine law within acute triangles

#### 10D.T3.03

Determine the measures of sides and angles in acute triangles, using the sine law and the cosine law