Properties of Angles

How many degrees are there in a triangle?

• 180

• 360

• 90

• Every triangle is different

Calculate the value of x.

Angles a and b sum to 180 degrees.

These are examples of...

• Supplementary angles

• Co-interior angles

• Vertically Opposite angles

• Alternate angles

Solve for x.

Angles a and b are equal. What kind of angles are they?

• External

• Vertically Opposite

• Supplementary

• Corresponding

Angles a, b and c sum to how many degrees?

Calculate the value of angle x.

Consider angle 4.

Angle 4 is equal to...

• Angle 2

• Angle 1 + Angle 3

• Angle 3 - 180 degrees

• Angle 1 + Angle 2

Solve for both C and D.

Solve for y.