Difference between revisions of "Complementary angles"
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(Created page with "===Name of the activity=== Brief blurb describing what the activity. If this has been borrowed from some external web site (for example, a non OER or OER site which had this...") |
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=== Objectives === | === Objectives === | ||
| − | + | Introduce children to concept of complementary angles | |
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===Estimated Time=== | ===Estimated Time=== | ||
| + | 30 minutes | ||
=== Prerequisites/Instructions, prior preparations, if any === | === Prerequisites/Instructions, prior preparations, if any === | ||
| + | Prior knowledge of point, lines, angles | ||
===Materials/ Resources needed=== | ===Materials/ Resources needed=== | ||
| + | * Digital : Computer, geogebra application, projector. | ||
| + | * Non digital : Worksheet and pencil. | ||
| + | * Geogebra files : '''[https://ggbm.at/guttgn3k Complementary angles.ggb]''' | ||
| + | {{Geogebra|guttgn3k}} | ||
| + | |||
===Process (How to do the activity)=== | ===Process (How to do the activity)=== | ||
| − | + | * Prior hands on activity (optional – children can use news paper strips to make angles and place them together and notice if the resulting angle formed is a right angle)'''.''' | |
| − | + | * Students should be able to identify the types of angles in the file | |
| − | + | * Let them attempt to join the two angles -They may try by coinciding different points or lines. | |
| − | + | * Ask about the angle formed by joining the two angles? | |
| − | + | * Challenge them to find another way to make a right angle using the two existing angles. | |
| − | + | * Interchanging the position of the two angles – ask what they notice. | |
| − | + | * If one angle is changed will the two together again form a complementary angle. | |
| + | * Children can be asked to make note of the angle measures for different angles work sheet | ||
| + | * Observations made with angles seen so far. | ||
| + | * Ask if the angles have to be adjacent to be complementary pairs | ||
| + | * Record the values of the two angles and their sum in the worksheet | ||
| + | : {| class="wikitable" | ||
| + | |Sl No. | ||
| + | |Value of slider α | ||
| + | |Angle ABC | ||
| + | |Angle DEF | ||
| + | |Sum | ||
| − | + | Angle ABC + Angle DEF | |
| + | |Is angle ABC complement of angle DEF | ||
| + | |- | ||
| + | |. | ||
| + | | | ||
| + | | | ||
| + | | | ||
| + | | | ||
| + | | | ||
| + | |} | ||
| + | * '''Evaluation at the end of the activity''' | ||
| + | # What are complementary pair of angles? | ||
| + | # Is it required for the pair of angles to be adjacent to be complementary? | ||
| + | # What types of angles form complementary pair? | ||
Revision as of 12:11, 25 April 2019
Name of the activity
Brief blurb describing what the activity. If this has been borrowed from some external web site (for example, a non OER or OER site which had this idea and based on which the activity was developed)
Objectives
Introduce children to concept of complementary angles
Estimated Time
30 minutes
Prerequisites/Instructions, prior preparations, if any
Prior knowledge of point, lines, angles
Materials/ Resources needed
- Digital : Computer, geogebra application, projector.
- Non digital : Worksheet and pencil.
- Geogebra files : Complementary angles.ggb
Download this geogebra file from this link.
Process (How to do the activity)
- Prior hands on activity (optional – children can use news paper strips to make angles and place them together and notice if the resulting angle formed is a right angle).
- Students should be able to identify the types of angles in the file
- Let them attempt to join the two angles -They may try by coinciding different points or lines.
- Ask about the angle formed by joining the two angles?
- Challenge them to find another way to make a right angle using the two existing angles.
- Interchanging the position of the two angles – ask what they notice.
- If one angle is changed will the two together again form a complementary angle.
- Children can be asked to make note of the angle measures for different angles work sheet
- Observations made with angles seen so far.
- Ask if the angles have to be adjacent to be complementary pairs
- Record the values of the two angles and their sum in the worksheet
Sl No. Value of slider α Angle ABC Angle DEF Sum Angle ABC + Angle DEF
Is angle ABC complement of angle DEF .
- Evaluation at the end of the activity
- What are complementary pair of angles?
- Is it required for the pair of angles to be adjacent to be complementary?
- What types of angles form complementary pair?