NAVIGATION






Mrs. Tait's & Mrs. Fleischhauer's Class


Grade 4 - Room 202

Unit 13 (BIM) - Identify and Draw Lines and Angles



Chapter 13 - Identify and Draw Lines and Angles

In this chapter, your student is learning how to identify and draw lines and angles. The vocabulary terms associated with this chapter are: acute angle, adjacent angles, angle, complementary angles, degree, endpoints, intersecting lines, line, line segment, obtuse angle, parallel lines, perpendicular lines, point, protractor, ray, right angle, straight angle, supplementary angles, and vertex.

Help your student learn to identify and draw lines and angles using clocks!

  • First, gather as many analog clocks as you can find in your house.
  • Use the minute and hour hands of the clocks to represent the rays of an angle and set the clocks to different angles. Form a right angle (L-shaped angle), a straight angle (straight line), an acute angle (opens less than a right angle), and an obtuse angle (opens more than a right angle). Ask your student to classify each angle. Then point to your right-angle clock and ask, “Are the hour hand and minute hand perpendicular? What is the difference between parallel lines and perpendicular lines?”
  • Hold up a clock and say, “This clock is divided into 12 equal parts. What is the measure of the angle that turns through 3 parts?”
  • Set one of the clocks to 11:10, and tell your student that the clock is showing an angle that turns through of a circle. Ask, “What is the measure of the angle?”
  • If you have a protractor, have your student use it to measure different angles formed by the hour and minute hands on a clock. Ask your student to classify each angle as right, straight, acute, or obtuse.

By the end of this chapter, your student should feel confident with the learning targets and success criteria. Encourage your student to think of other contexts in which they can identify and draw lines and angles.

Have a great time “clocking in”!

 

Lesson

Learning Target

Success Criteria

13.1 Points, Lines, and Rays

Identify and draw points, lines, line segments, and rays.

·       I can identify points, lines, line segments, and rays.

·       I can name points, lines, line segments, and rays.

·       I can draw points, lines, line segments, and rays.

13.2 Identify and Draw Angles

Identify and draw angles. 

·       I can identify angles as right, straight, acute, or obtuse.

·       I can name angles.

·       I can draw angles.

13.3 Identify Parallel and Perpendicular Lines

Identify and draw intersecting lines, parallel lines, and perpendicular lines.

·       I can identify intersecting lines, parallel lines, and perpendicular lines.

·       I can draw intersecting lines, parallel lines, and perpendicular lines.

13.4 Understand Degrees

Measure angles using degrees.

·       I can use fractional parts of a circle to measure angles.

·       I can explain how degrees are related to fractional parts of a circle.

13.5 Find Angle Measures

Find the measures of angles.

·       I can find the angle measures of a pattern block.

·       I can use a pattern block to find an angle measure.

13.6 Measure and Draw Angles

Measure and draw angles.

·       I can use a protractor to measure an angle.

·       I can use a protractor to draw an angle.

13.7 Add Angle Measures

Find the measure of an angle using its parts.

·       I can identify the parts of an angle.

·       I can find the measure of an angle by adding its parts.

·       I can write an equation to find an angle measure.

13.8 Find Unknown Angle Measures

Find the measures of unknown angles.

·       I can describe how a pair of angles are related.

·       I can write an equation to find an unknown angle measure.

·       I can solve an equation to find an unknown angle measure.

 

Type of Angle Description
Acute Angle is less than 90°
Right Angle is 90° exactly
Obtuse Angle is greater than 90° but
less than 180°
Straight Angle is 180° exactly
Reflex Angle is greater than 180°
Full Rotation is 360° exactly
types of angle
 
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