Difference between revisions of "Supplementary angles"

Latest revision as of 07:34, 7 November 2019

Supplementary angles are two angles with a sum of 180°. A common case is when they lie on the same side of a straight line.

Objectives

Introduce children to concept of supplementary angles

Estimated Time

30 minutes

Prerequisites/Instructions, prior preparations, if any

Prior knowledge of point, lines, angles

Materials/ Resources needed

1. Digital : Computer, geogebra application, projector.
2. Non digital : Worksheet and pencil.
3. Geogebra files : Supplementary 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 straight angle).
Students should be able to identify the types of angles in the file
Let them attempt to join the two angle - They may try by coinciding different points or lines.
Ask about the angle formed by joining the two angles
Is the straight angle formed parallel to the x-axis.
Challenge them to find another way to make a straight angle using the two existing angles.
Interchanging the position of the two angles – ask what they notice.
If one of the angle is changed will the two together again form supplementary angle.
Readjust to make adjacent angles again to notice the resultant angle.
Children can be asked to make note of the angle measures for different positions of the slider in the work sheet
Ask students if the angles have to be adjacent to be supplementary 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 supplement of angle DEF

Evaluation at the end of the activity

What are supplementary pair of angles?
Is it required for the pair of angles to be adjacent to be supplementary?
What type of angles form supplementary pair?

@@ Line 1: / Line 1: @@
-===Name of the activity===
+Supplementary angles are two angles with a sum of 180°. A common case is when they lie on the same side of a straight line.
-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 ===
-Content objectives  - what content areas
+Introduce children to concept of supplementary angles
-Skill objectives - what specific skills
-Classroom objectives - to demo peer learning, to make a classroom resource, etc -
-All these kinds of objectives need not be there for every activity.  And no need to list them as different headings.  This is only for our reference when we are developing activities.
 ===Estimated Time===
+minutes
 === Prerequisites/Instructions, prior preparations, if any ===
+Prior knowledge of point, lines, angles
 ===Materials/ Resources needed===
+* 1. Digital : Computer, geogebra application, projector.
+* 2. Non digital : Worksheet and pencil.
+* 3. Geogebra files : [https://ggbm.at/ufp9j6ja Supplementary angles.ggb]
+{{Geogebra|ufp9j6ja}}
 ===Process (How to do the activity)===
-How to do the different steps of 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 straight angle)'''.'''
+* Students should be able to identify the types of angles in the file
-What kinds of questions you can ask for that activity
+* Let them attempt to join the two angle - They may try by coinciding different points or lines.
+* Ask about the angle formed by joining the two angles
-What are the student follow-up activities/ questions you can give?
+* Is the straight angle formed parallel to the x-axis.
+* Challenge them to find another way to make a straight angle using the two existing angles.
+* Interchanging the position of the two angles – ask what they notice.
+* If one of the angle is changed will the two together again form supplementary angle.
+* Readjust to make adjacent angles again to notice the resultant angle.
+* Children can be asked to make note of the angle measures for different positions of the slider in the work sheet
+* Ask students if the angles have to be adjacent to be supplementary 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
-Categories:  (Subject) (Topic) (Sub-concept/topic) (Class 6) (Resource format)
+Angle ABC + Angle DEF
+|Is angle ABC supplement of angle DEF
+|-
+|
+|
+|
+|
+|
+|
+|}
+* '''Evaluation at the end of the activity'''
+# What are supplementary pair of angles?
+# Is it required for the pair of angles to be adjacent to be supplementary?
+# What type of angles form supplementary pair?
-Example -  (Mathematics) (Triangle) (Area) (Perimeter) (Class 6) (Class 8) (Geogebra) (Video)
+[[Category:Lines and Angles]]