CCSS.Math.Content.4.G.A

CCSS.Math.Content.4.G.A is a cluster heading. These are the individual standards under it.

• CCSS.Math.Content.4.G.A.1

  Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

• CCSS.Math.Content.4.G.A.2

  Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. ...

• CCSS.Math.Content.4.G.A.3

  Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Ide...

01

What Students Need to Do

Students draw and name points, lines, line segments, rays, angles, and parallel or perpendicular lines. They classify two-dimensional shapes by their sides and angles and find lines of symmetry.

02

What Mastery Looks Like

Given a diagram, students correctly name lines, segments, rays, acute angles, right angles, and obtuse angles. They classify triangles and quadrilaterals using side and angle properties, then identify lines of symmetry.

03

Common Misconceptions

Students may confuse lines, segments, and rays, or judge angle size by side length. They may think a rotated shape changes its name. They may also place shapes in only one category, such as calling a square only a square and not a rectangle.

04

How to Assess It

Give this exit ticket: Draw a rectangle, mark parallel and perpendicular sides, name its angles, list its shape categories, and draw its symmetry lines.

1. 01

   Use craft sticks to build intersecting, parallel, and perpendicular lines, then form and label acute, right, and obtuse angles.

2. 02

   Ask students to explain in writing why every square is a rectangle, using facts about sides and angles.

3. 03

   Sort shape cards into overlapping hoops labeled parallel sides, perpendicular sides, right angles, and line symmetry.

4. 04

   Photograph classroom objects, then mark parallel lines, perpendicular lines, angle types, and symmetrical shapes on printed copies.

• CCSS.Math.Content.2.G.A.1

  Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pe...

• CCSS.Math.Content.7.G.A

  Draw, construct, and describe geometrical figures and describe the relationships between them.