Law of Sines and Triangle Properties

Solving any triangle by relating side lengths to angles

Calculating the area of a circle

Solving right triangles

Finding the perimeter of a polygon

Tangent

Cosine

Sine

Secant

By using the Pythagorean theorem

By equating the sine ratios of different angles

By calculating the area of the triangle

By using the cosine rule

A triangle with all angles equal

A triangle with one right angle

A triangle that is not a right triangle

A triangle with all sides equal

When two angles and a side are known

When the triangle is equilateral

When all sides are known

When only one angle is known

Calculate the area of the triangle

Identify the known angles and sides

Draw the triangle accurately

Use the cosine rule

Use the tangent ratio

Use the Pythagorean theorem

Use the Law of Cosines

Use the Law of Sines

Because the angle is acute

Because the triangle is equilateral

Because the angle is obtuse

Because of its position on the unit circle

The Law of Cosines

The Pythagorean theorem

The area of triangles

The tangent ratio