Virginia SOL K.MG.2.b
The Standard
Describe triangles, squares, and rectangles to include the number of sides and number of vertices.
Virginia Standards of Learning for Mathematics · The student will identify, describe, name, compare, and construct plane figures (circles, triangles, squares, and rectangles).
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students name triangles, squares, and rectangles, even when the shapes are turned or shown in different sizes. They count each straight side and each corner without counting twice.
What Mastery Looks Like
- Given shapes in different sizes and positions, the student names each one and counts its sides and corners correctly. The student explains that a triangle has three of each, while squares and rectangles have four of each.
Common Misconceptions
- Students may count corners as sides or skip a side while counting. They may call a turned square a diamond or think a larger shape has more sides.
How to Assess It
- Give this exit prompt: “Draw a triangle, square, and rectangle. Dot every corner, then write each shape’s number of sides and corners.”
Lesson moves
Ways to Teach It
Build triangles, squares, and rectangles with craft sticks and clay balls, then count the sticks and balls aloud.
Show a square and rectangle, then ask, “How are their side and corner counts alike?”
Play a shape card game where students name each drawn card and count its sides and corners to keep it.
Hunt for triangular, square, and rectangular objects in the classroom, sketch each one, and mark its sides and corners.
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Printable K.MG.2.b Worksheet
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Related Standards
- 3.MG.4.c
Identify and describe triangles, quadrilaterals, pentagons, hexagons, and octagons in various orientations, with and without contexts.
- 4.MG.6.b
Identify and describe solid figures (cube, rectangular prism, square pyramid, and sphere) according to their characteristics (number of angles, vertices, edges,...
- 1.MG.2.c
Draw and name the plane figure (circle, square, rectangle, triangle) when given information about the number of sides, vertices, and angles.
- 1.MG.2.a
Describe triangles, squares, and rectangles using the terms sides, vertices, and angles. Describe a circle using terms such as round and curved.
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