4g1 Worksheets

4g1

• Decide whether an angle shown is a right angle (90°).
• Tell the difference between right angles and angles that are smaller (acute) or larger (obtuse).
• Recognize that perpendicular lines meet to make a 90° angle.

4g1

• Spot and name acute, right, and obtuse angles in different shapes.
• Count how many of each type of angle a shape has.
• Use the corners (vertices) of a polygon to decide where the angles are.

4g1

• Identify whether an angle is acute, right, obtuse, or straight by looking at it.
• Compare an angle to a right angle as a quick visual benchmark.
• Notice when an angle is smaller than 90°, exactly 90°, between 90° and 180°, or exactly 180°.
• Use the shape and direction of the rays to classify angles even when they are rotated.

4g1

• Tell whether two lines are parallel, perpendicular, or intersecting by looking at a picture or graph.
• Spot right angles to recognize when lines are perpendicular.
• Notice when lines never meet to identify parallel lines.
• Describe where two lines cross and name that point as an intersection.