Geometry Y9

Angles that add to 180° are known as...

• Complementary

• Congruent

• Supplementary

• Corresponding

Angles that are congruent...

• Add to 180°

• Add to 90°

• Are equal

• Add to 360°

Angles that are complementary...

• Add to 180˚

• Are equal

• Add to 90˚

• Add to 360˚

Angles in an equilateral triangle...

• Add to 180˚

• Are equal

• Equal 60˚

• All of the above

The two base angles of an isosceles triangle...

• Are congruent

• Are co-interior

• Are corresponding

• Are alternate

The exterior angle of a triangle...

• Is congruent to 180˚

• Adds to 90˚

• Is supplementary to the sum of the two interior opposite angles

• Is equal to the sum of the two interior opposite angles

Parallel lines...

• Are lines that never intersect

• Are marked with identical arrowheads

• Are lines where the distance between them is constant along their lengths

• All of the above

A transversal...

• Is a parallel line

• Is a line that intersects two or more parallel lines

• Is a type of triangle

• Is indicated by an arrowhead

Co-interior angles are...

• Angles on opposite sides of a transversal that intersects two parallel lines

• Angles in matching corners where two parallel lines are crossed by a transversal

• Angles that are vertically opposite to each other

• Angles that lie between two parallel lines and on the same side of a transversal

Corresponding angles are...

• Angles on opposite sides of a transversal that intersects two parallel lines

• Angles in matching corners where two parallel lines are crossed by a transversal

• Complementary, because they add to 90˚

• Supplementary, because they add to 180˚