Lines and Angles
Mathematics, Grade 4
Lines and Angles
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Lines and Angles
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Lines and Angles
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Lines and Angles
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Study Guide Lines and Angles Mathematics, Grade 4
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GEOMETRY: LINES AND ANGLES What Are Lines and Angles? There are 3 sets of Lines: • Intersecting Lines are lines that cross and have one point in common. • Perpendicular lines are special intersecting lines that form right angles (square corners) where they intersect. • Parallel lines are lines that never cross. Parallel lines are always the same distance apart and do not share any points. There are 4 sets of Angles: • Acute angles measure less than 90°. • Obtuse angles measure more than 90°. • Right angles measure 90°. • Straight angles measure 180°. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
How to figure out Lines and Angles: Lines: Decide if lines are intersecting, parallel or perpendicular based on what they look like. Example: Intersecting Perpendicular Parallel To find Angles, you need to use a protractor to measure the angle. Steps to measuring an Angle using a protractor: • Place the arrow of the protractor on the vertex of the angle. • Place the zero edge of the protractor along on side of the angle. • Read the measure of the angle. Example: Straight angle Acute angle © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Try This! Identify the lines as Perpendicular, Parallel, or Intersecting. Measure each angle and identify it as acute, right, obtuse, or straight. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
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