# Teaching 4.G.A.1 .2 – Draw Points, Lines, Line Segments, Rays, Angles (Right, Acute, Obtuse) & Perpendicular & Parallel Lines – Classify Two-Dimensional Figures & Identify Right Triangles

## Geometry – 4th Grade

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

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

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

Quadrilateral

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

**Online Problems and Assessments**

Khan Academy – Questions and Video Lessons

Acute, right, obtuse, and straight angles

Lines, line segments, and rays

Parallel, perpendicular, intersecting

Identify 2-dimensional and 3-dimensional shapes

Classify triangles by angles

Which 2-dimensional shape is being described?

Classify quadrilaterals

**Online Games**

Points,Lines, Angles

Classify Two-Dimensional & Right Angles

**Printables**

Points,Lines, Angles

Classify Two-Dimensional & Right Angles

Assessment Task 1

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Assessment Task 11