Lesson Plan
EngageNY

Unknown Angle Proofs—Proofs of Known Facts

For Teachers 9th - 10th Standards
Lead the class in a Greek history lesson with a geometric twist. Pupils relate a short video about geometric properties to modern-day methods of solving for unknown angles. They discuss parallel line theorems and complete...
Lesson Plan
Curated OER

Creating Parallel Lines and Transversals

For Teachers 9th - 12th Standards
Have your class create parallel lines. Students will learn how to identify the different angles created by a parallel line cut by a transversal. Then, they identify and name similar and different angles.
Worksheet
Curated OER

Parallel Lines and Transversal Wroksheet

For Students 10th
For this Geometry worksheet, 10th graders determine the measures of all angles in a diagram involving parallel lines cut by multiple transversals.  The one page worksheet contains six problems.  Answers provided. 
Worksheet
Curated OER

Construct, Bisect, Duplicate: Geometry Practice with Compass and Straight Edge

For Students 9th - 12th
Geometers employ a straight edge and compass to duplicate and bisect segments and angles, construct perpendiculars, parallel lines, figures, and circles with points of concurrency. Ample practice with 65 questions across 8 worksheets. No...
Worksheet
Curated OER

Points, Lines, and Line Segments - Homework 16.1

For Students 4th - 5th
In this geometry learning exercise, students complete a homework assignment in which they name 3 lines and line segments. They write parallel, intersecting, or perpendicular, to describe the relationships between 4 pairs of lines. They...
Lesson Plan
Curated OER

Parallel and Perpendicular Lines

For Teachers 3rd - 4th
Here is a parallel and perpendicular lines worksheet which has learners respond to 10 questions that require them to identify lines and draw lines.
Unit Plan
1
1
Mathematics Vision Project

Similarity and Right Triangle Trigonometry

For Teachers 10th - 12th Standards
Starting with similar triangles and dilation factors, this unit quickly and thoroughly progresses into the world of right triangle features and trigonometric relationships. Presented in easy-to-attack modules with copious application...
Lesson Plan
Curated OER

Parallel and Perpendicular Lines

For Teachers 10th
Tenth graders explore parallel and perpendicular lines.  For this geometry lesson, 10th graders investigate the relationships associated with parallel lines and transversals, perpendicular lines, and the angles formed by these...
Lesson Plan
Curated OER

Angles

For Teachers 4th - 5th
Fourth and fifth graders investigate angles and name them according to the criteria for obtuse, acute, and right angles. They examine a human-made yarn pattern on the floor of their classroom and identify angles, vertices, and types of...
Instructional Video5:17
2
2
Flipped Math

Unit 3 Review: Parallell and Perpendicular Lines

For Students 9th - 12th Standards
Learners watch a quick review on the Parallel and Perpendicular Lines unit. The pupils work through ten review problems ranging from identifying types of angles formed by parallel lines and transversals to writing equations of parallel...
Instructional Video9:36
2
2
Flipped Math

Proving Lines Parallel

For Students 9th - 12th Standards
Show it can all be proved. Scholars learn the converses of the properties of parallel lines. Using the converses, pupils determine which lines are parallel based on angle measurements and practice using a flow proof to show that two...
Worksheet
Academic Magnet High School

Parallel Lines Proofs Practice

For Students 8th - 11th Standards
Here is a worksheet that lines up perfectly with the skills needed to finish a geometric proof. Eleven problems are given to see if learners can prove that lines are parallel or angles are congruent. 
Worksheet
Curated OER

Proving Lines Parallel Homework

For Students 9th - 12th
In this parallel lines worksheet, learners solve 13 short answer and fill in the blank problems. Students determine which lines are parallel given a statement such as if these angle measures are equal then which lines are parallel?...
Worksheet
Curated OER

Parallel Lines and Transversals

For Students 10th
In this parallel lines and transversals worksheet, 10th graders solve nine different problems related to measuring parallel lines and transversals. First, they name two more pairs of parallel segments, two more skew segments, and two...
Lesson Plan
Curated OER

Determining Angle Measure with Parallel Lines

For Teachers 9th - 12th
Students observe and solve examples of corresponding angle postulates, alternate interior angle theorems, and exterior and consecutive angles. They complete the Determining Angle Measure With Parallel Lines worksheet.
Worksheet
Curated OER

Parallel Lines and Types of Angles

For Students 5th - 6th
In this angles and parallel lines worksheet, students solve 40 problems that pertain to parallel lines, supplementary, vertical, corresponding and alternate angles. There is instruction on the page with examples. This page is intended as...
Worksheet
Curated OER

Diagnostic Test: Angles & Parallel Lines

For Students 9th - 11th
For this diagnostic test worksheet, students solve problems involving angles, parallel lines, and perpendicular lines. They identify alternate interior angles, alternate exterior angles, and corresponding angles. Students find the...
Worksheet
Curated OER

Angles and Parallel Lines

For Students 10th
In this angles and parallel lines instructional activity, 10th graders solve 12 different types of problems that include measuring various angles and parallel lines in given figures. First, they find the measure of each angle using the...
Worksheet
Curated OER

Parallel Lines and Transversals

For Students 10th
In this parallel lines and transversals instructional activity, 10th graders solve eleven problems that include identifying and defining transversals and parallel lines. First, they state the transversal that forms each pair of angles...
Worksheet
Curated OER

Angles and Parallel Lines

For Students 10th
For this angles and parallel lines worksheet, 10th graders solve 15 different problems related to measuring angles and parallel lines in three different figures. First, they find the measure of each angle in the first figure, numbers...
Worksheet
Curated OER

Twenty-Eight Parallel Lines with a Transversal Problems

For Students 9th - 10th
In this parallel lines with a transversal worksheet, students identify angles as corresponding, alternate interior, or alternate exterior, find the measure of angles, and solve for indicated values.  The solutions are provided.
Worksheet
Curated OER

Parallel Lines and Proportional Parts

For Students 10th
In this parallel lines and proportional parts worksheet, 10th graders solve 5 different problems related to determining whether lines are parallel and proportional in each figure. First, they refer to the figure shown at the top to...
Lesson Plan
Curated OER

Constructing Parallel Lines

For Teachers 8th - 10th
Students construct parallel lines using a protractor and a straightedge. In this geometry instructional activity, students identify the properties of parallel lines. They use Cabri to graph and observe the lines.
Worksheet
Curated OER

Parallel Lines

For Students 10th
In this parallel lines worksheet, 10th graders solve and complete 16 different types of problems. First, they name the lines that are parallel to those listed. Then, students find that values that make each set of line parallel. They...

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