For this unit you will need: a ruler, compass, and protractor (a complete geometry kit)
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How to Copy an Angle using a Compass and a Ruler:
How to Bisect an Angle using a Compass and a Ruler:
How to Create a 60 degree Angle using a Compass and a Ruler:
How to Create a 90 degree Angle (Right Bisector) using a Compass and a Ruler:
Starts at 2:37
Starts at 2:37
Vertical Angles are created by intersecting lines. Vertical angles are congruent.
In the diagram below:
angle a and angle c are vertical angles.
angle b and angle d are vertical angles.
angle f and angle h are vertical angles.
angle e and angle g are vertical angles.
In the diagram below:
angle a and angle c are vertical angles.
angle b and angle d are vertical angles.
angle f and angle h are vertical angles.
angle e and angle g are vertical angles.
Alternate Interior and Exterior Angles:
Alternate Interior Angles are angles that sit inside the parallel lines and on alternate sides of the transversal.
In the diagram below:
Angle d and angle f are alternate interior angles.
Angle c and angle e are alternate interior angles.
Alternate Interior Angles are angles that sit inside the parallel lines and on alternate sides of the transversal.
In the diagram below:
Angle d and angle f are alternate interior angles.
Angle c and angle e are alternate interior angles.
Alternate Exterior Angles are angles that sit outside the parallel lines and on alternate sides of the transversal.
In the diagram above:
Angle b and angle h are alternate exterior angles.
Angle a and angle g are alternate exterior angles.
In the diagram above:
Angle b and angle h are alternate exterior angles.
Angle a and angle g are alternate exterior angles.
Complementary Angles are two angles that equal 90 degrees.
Supplementary Angles are two angles that equal 180 degrees.
Supplementary Angles are two angles that equal 180 degrees.