Georgia 3.GSR.6.1
The Standard
Identify perpendicular line segments, parallel line segments, and right angles, identify these in polygons, and solve problems involving parallel line segments, perpendicular line segments, and right angles.
Georgia's K-12 Mathematics Standards · Identify the attributes of polygons, including parallel segments, perpendicular segments, right angles, and symmetry.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students inspect shapes and decide which sides never meet, which sides meet at square corners, and where right angles appear. They use these features to describe polygons and solve shape problems.
What Mastery Looks Like
- Students can mark parallel sides, perpendicular sides, and right angles in polygons shown in any position. They can explain each choice using square corners and whether lines would ever meet.
Common Misconceptions
- Students may think parallel sides must be the same length or must run horizontally. They may call any intersecting sides perpendicular or miss right angles when a shape is rotated.
How to Assess It
- On grid paper, draw a quadrilateral with exactly one pair of parallel sides and two right angles. Label the parallel sides, right angles, and one perpendicular pair.
Lesson moves
Ways to Teach It
Build polygons with craft sticks, then use a paper square corner to test and label parallel sides, perpendicular sides, and right angles.
Show a rotated rectangle and ask, "How can you prove its sides are still parallel or perpendicular?"
Play polygon feature bingo using cards labeled with clues such as two parallel sides, four right angles, or one perpendicular pair.
Walk around the classroom and sketch objects that show parallel edges, perpendicular edges, and right angles, such as tiles, doors, and shelves.
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Printable 3.GSR.6.1 Worksheet
A ready-to-print activity worksheet aligned to 3.GSR.6.1, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 4.GSR.8
Identify and draw geometric objects, classify polygons based on properties, and solve problems involving area and perimeter of rectangular figures.
- 4.GSR.8.2
Classify, compare, and contrast polygons based on lines of symmetry, the presence or absence of parallel or perpendicular line segments, or the presence or abse...
- 4.GSR.8.1
Explore, investigate, and draw points, lines, line segments, rays, angles (right, acute, obtuse), perpendicular lines, parallel lines, and lines of symmetry. Id...
- 3.GSR.6
Identify the attributes of polygons, including parallel segments, perpendicular segments, right angles, and symmetry.
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