Interior Angles

FIRST, SCROLL TO THE BOTTOM OF THIS PAGE AND MAKE SURE YOU ARE SIGNED INTO YOUR JCPS ACCOUNT.

On the graph below, the arrows pointed to the right mean that the two lines are parallel. Measure ONLY the interior angles: (

). Then color the congruent angles the same color.

Which line above is the "transversal line"?

Here, the congruent angles are a rotation of each other. For example, if you rotate Angle DFG 180 degrees around Point G, it will end up at Angle AHG. These are called "Alternate Interior Angles" "Alternate" means they are on opposite sides of the transversal line (one on the left and one on the right). "Interior" means they are in between the parallel lines (inside the parallel lines).

Which angle is Alternate Interior with ?

Which definition best describes Alternate Interior Angles?

Select all that apply

A
They form a straight line.
B
The are across from each other over intersecting lines. (opposite sides of an X).
C
They are on opposite sides of the transversal and inside the parallel lines.
D
They are in matching corners of two parallel lines.

Check my answer (3)

Which transformation best describes Alternate Interior Angles?

Select all that apply

A
Translations
B
Rotations
C
Reflections

Check my answer (3)

Looking at your graph above, finish this conjecture: "If a transversal crosses two parallel lines, then Alternate Interior Angles are always..."

Select all that apply

A
Supplementary
B
Congruent
C
Complimentary

Check my answer (3)

Look at your graph again. Angle DFG and Angle BHG are called "Same Side Interior Angles". "Same side" means they are on the same side of the transversal line (both on the right). "Interior" means they are in between the parallel lines (inside the parallel lines).

If Angle DFG and Angle BHG are Same Side Interior Angles, what other pair of angles could be considered Same Side Interior?

Add up the measure of the Same Side Interior Angles. What do you notice?

Which definition best describes Same Side Interior Angles?

Select all that apply