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# Draw Points, Lines, and Angles

## Geometry – 4th Grade

#### Draw and identify lines and angles, and classify shapes by properties of their lines and angles.

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. Recognize right triangles as a category, and identify right triangles.

Teacher Notes
Point, line segments, and angles can be classified by their properties as well as basic foundations of geometric shapes.  Polygons can have similar features and still be unique because of the characteristics of the elements that were used to create them.
Two-dimensional figures may be classified using different characteristics such as parallel or perpendicular lines or by angle measurement

Student Knowledge Goals

*I know the definitions of and can draw and describe  the following geometric terms:
Points
Lines (parallel and perpendicular)
Line segments
Rays
Angles (right, acute, obtuse and straight)

*I can explain the difference between a line, a line segment, and a ray.
Students must know and be able to identify the following:
Lines (parallel and perpendicular)
Angles (acute, obtuse, and right)
Triangles (acute, obtuse, and right)
Students must know and be able to identify the following (taught in previous grades):
Cube
Half/Quarter Circle
Hexagon
Pentagon
Polygon
Rectangle
Rhombus/Rhombi
Square
Trapezoid
Triangle

Vocabulary
acute angle
angles (right, obtuse, acute and straight)
degrees
line segment
obtuse angle
parallel lines
perpendicular lines
point
ray
right angle
straight angle
classify
two-dimensional
triangle (acute, obtuse, right)

Lessons
Engage NY Module 4 A-1 – Identify and draw points, lines, line segments, rays, and angles and recognize them in various contexts and familiar figures.
Engage NY Module 4 A-2 – Use right angles to determine whether angles are equal to, greater than, or less than right angles.  Draw right, obtuse, and acute angles.
Engage NY Module 4  A-3 – Identify, define, and draw perpendicular lines.
Engage NY Module 4 A-4 – Identify, define, and draw parallel lines.
Points,Lines, Angles
Classify Two-Dimensional & Right Angles

Student Video Lessons
Learn Zillion – Draw and identify points, lines, rays, and angles
Learn Zillion – Classify two-dimensional shapes, including right triangles, using their properties
Virtual Nerd - 4.G.A.2
Virtual Nerd - Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.
Study Jams – Types of Lines