## 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.