Lesson Worksheet: Lines and Angles of 2D Shapes Mathematics • 3rd Grade

In this worksheet, we will practice describing polygons by considering whether they have acute, obtuse, or right angles and the number of pairs of parallel or perpendicular sides they have.


Look at this rectangle and answer the questions.

True or False: It contains two pairs of parallel lines.

  • ATrue
  • BFalse

True or False: It contains one pair of perpendicular lines.

  • ATrue
  • BFalse


Take a look at this shape then answer the questions.

How many angles does it have?

How many obtuse angles does it have?


The given quadrilateral contains two angles.

  • Aacute
  • Bright
  • Cobtuse


Which of the following shapes has 4 sides, 2 acute angles, 2 obtuse angles, and one pair of parallel lines?

  • A
  • B
  • C
  • D


How many pairs of parallel lines are in the given shape?


How many obtuse angles does this shape have?


How many pairs of parallel lines does this shape have?


The given triangle has two angles and one angle.

  • Aacute, right
  • Bobtuse, right
  • Cobtuse, acute
  • Dacute, obtuse


How many acute angles does the given figure have?


How many pairs of perpendicular lines are there in the given figure?

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