Interior Angles On Parallel Lines

On parallel lines co interior or c angles add up to 180.

Interior angles on parallel lines. Alternate interior angles are interior between the parallel lines and they alternate sides of the transversal. Angles that are in the area between the parallel lines like angle 2 and 8 above are called interior angles whereas the angles that are on the outside of the two parallel lines like 1 and 6 are called exterior angles. Corresponding alternate and co interior angles.

Worksheet parallel lines problems a mixture of problems based around finding angles created by parallel lines and transversals. If two lines are cut by a transversal and the alternate interior angles are congruent the lines are parallel. These lines are parallel because a pair of corresponding angles are equal.

M 1 m 2 and m 3 m 4. If two parallel lines are cut by a transversal the alternate interior angles are congruent. The consecutive interior angles are supplementary and the alternate interior angles are congruent.

Interactive student tasks iwb material angles on points and. Notice that they are not adjacent angles next to one another sharing a vertex. Worksheet parallel lines questions focussed on the angle rules with parallel lines.

The worksheet is specially designed for students of grade 8 and grade 9. As you can see the c shape may appear back to front but this doesn t affect the angle measurements. Alternate exterior angles measures are equal the name clearly describes where these angles are located.

Arrowheads show lines are. These lines are not parallel because a pair of consecutive interior angles do not add up to 180 81 101 182 these lines are parallel because a pair of alternate interior angles are equal. Use these properties of the angle pairs to find the value of x.