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Math Is Fun! | Parallel Lines & Transversals Webpage

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Math Is Fun! | Parallel Lines & Transversals Webpage

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Excellent website with multiple visuals to help you better understand the different types of angles.

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Parallel Lines

Lines are parallel if they are always the same distance apart (called "equidistant"), and will never meet. Just remember:

Always the same distance apart and never touching.

The red line is parallel to the blue line in each of these examples:

Parallel lines also point in the same direction.

Parallel lines have so much in common. It's a shame they will never meet!

Try it yourself:

Pairs of Angles

When parallel lines get crossed by another line (which is called a Transversal), you can see that many angles are the same, as in this example:

These angles can be made into pairs of angles which have special names.

Click on each name to see it highlighted:

Now play with it here. Try dragging the points, and choosing different angle types. You can also turn "Parallel" off or on:

images/geom-line-para.js?mode=corr

Testing for Parallel Lines
Some of those special pairs of angles can be used to test if lines really are parallel:

Examples

813, 814, 1783, 3298, 815, 816, 1784, 1785, 3299, 3300

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Lines are parallel if they are always the same distance apart (called "equidistant"), and will never meet. Just remember: The red line is parallel to the blue line in each of these examples: Parallel lines also point in the same direction. Parallel lines have so much in common.

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Click the links below for good ol' fashioned Gimkit practice! If you want some Fishtopia-style homework, just let me know:

Angles & Triangles Cumulative Review

Interior Angles in Polygons

Exterior Angle Theorem in Triangles

Parallel Lines & Transversals

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Gimkit is a game show for the classroom that requires knowledge, collaboration, and strategy to win. Get started for free!

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Parallel Lines Cut by a Transversal & Angle Relationships! - YouTube

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CLICK HERE to visit Flocabulary to get some hip-hop 🔥🔥🔥 plus some math lines that will 🤯 blow your mind! Complete any activity listed for the following:

Angle Relationships

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Use the Quizizz links below to practice specific skills for the unit. Also, make sure to check out any explanations I offer on specific questions:

Parallel Lines + Transversals

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Using algebra to find measures of angles formed from transversal | Geometry | Khan Academy

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Exterior Angle Theorem in Triangles Examples

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Exterior Angle Theorem in Triangles Examples

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Exterior Angle Theorem For Triangles, Practice Problems - Geometry

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Using Triangles to Determine Interior Angle Sums in Polygons

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Using Triangles to Determine Interior Angle Sums in Polygons

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How to use triangles to find the measure of interior angles of a polygon

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Using the Formula Method to Determine Interior Angle Sums in Polygons

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Using the Formula Method to Determine Interior Angle Sums in Polygons

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Finding Individual Interior Angles in Polygons

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Finding Individual Interior Angles in Polygons

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Interior Angle in a Polygon How to Find (Formula) - YouTube

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Interior Angle in a Polygon How to Find (Formula)

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How do you determine two triangles are similar using angle angle aa - YouTube

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How do you determine two triangles are similar using angle angle aa

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CLICK HERE to use the Unit #3 Quizlet to brush up on your angles and triangles terms!

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Check out our Math 8 Digital Word Wall, made with Book Creator App! If you click Read to Me, you'll have definitions read to you and additional explanations for various terms!

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This Book offers visuals, definitions, and audio explanations of 8th-grade math terms. All vocab words are aligned with Big Ideas Math.

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Two or more lines that are always the same distance apart and never touching.

~ Parallel lines have so much in common. It's a shame they will never meet! ~

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Unit 3.1 ~ Parallel Lines & Transversals

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Missing Interior Angle Measures in Triangles

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Missing Interior Angle Measures in Triangles

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In the above GIF, you can see the measures of angles C & D are equal to the measure of angle A. Regardless of how the angles are manipulated, the remote interior angles' sum will alway be congruent to the exterior angle.

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A line that intersects two or more lines. Several pairs of congruent angles are formed when a transversal cuts parallel lines.

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Four of these are formed inside two parallel lines cut by a transversal. In the above image, alternate interior angles are displayed.

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Four of these are formed on the outside of two parallel lines cut by a transversal. In the above image, alternate exterior angles are displayed.

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A closed plane figure is made up of three or more line segments that intersect only at their endpoints. A circle is NOT a polygon.

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Polygons where all the sides are congruent, and all the interior angles are congruent.

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The angles inside a polygon.

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The angles outside a polygon.

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The two triangles are similar because their angle measures are congruent, even though the side lengths/orientations may not be the same.

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Using similar figures to find a missing measure when it is difficult to find directly. In the picture above, you can use the Pythagorean theorem to determine the Sun's ray side measure.

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It's time for a Blooket Bonanza! Check out the links below to practice math concepts with some solo gameplay:

Parallel Lines & Transversals

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Visit IXL (use Clever) and work on the following recommendations:

Angle-angle criterion for similar triangles

Interior angles of polygons

Exterior Angle Theorem

Transversals of parallel lines: find angle measures

Identify complementary, supplementary, vertical, adjacent, and congruent angles

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Visit Formative to complete the following practice opportunities:

Multi-Step Equations + Angle Relationships

Angle Relationships + Finding Angle Measures

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WIZARD BATTLE! Visit Prodigy and play the game solo OR challenge a classmate! Click the above linked image and select 'Log in with: Google.'