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Questions and Answers
What type of angles are congruent on alternate sides of the transversal between parallel lines?
When lines are parallel and cut by a transversal, which angles are congruent?
Which theorem involves angles that add up to 180° and are on the same side of the transversal between parallel lines?
In example two, what theorems were applied to find x and y?
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Which theorem is used when finding angle x with congruent angles on alternate sides outside parallel lines?
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What theorem was used in example four to solve for x by setting up the equation 2.5x + 80 = 180?
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In example one, what was used to find x = 68?
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Study Notes
- Parallel lines are indicated by arrows and when cut by a transversal, they form corresponding angles, alternate interior angles, alternate exterior angles, and consecutive interior angles.
- Corresponding angles are congruent when lines are parallel and cut by a transversal, forming an X-shape where matching angles are equal.
- Alternate interior angles are congruent angles on alternate sides of the transversal between parallel lines.
- Alternate exterior angles are congruent angles on alternate sides outside the parallel lines when cut by a transversal.
- Consecutive interior angles are supplementary (add up to 180°) and are on the same side of the transversal between parallel lines.
- In example one, solving for x involved using consecutive interior angles theorem and vertical angles to find x = 68.
- In example two, finding x and y included applying alternate interior angles and consecutive interior angles theorems, resulting in x = 150 and y = 110.
- In example three, to find angle x, alternate exterior angles theorem and the concept of a straight line (180°) were used, leading to x = 95°.
- In example four, using the corresponding angles theorem and the concept of a linear pair, the equation 2.5x + 80 = 180 was solved to find x = 40.
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Description
Test your understanding of angle relationships formed by parallel lines and a transversal. Explore concepts such as corresponding angles, alternate interior angles, alternate exterior angles, and consecutive interior angles. Practice solving for unknown angles using theorems like the consecutive interior angles theorem and the alternate exterior angles theorem.
