Difference between revisions of "Angle sum property of a Triangle"
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# In a triangle, if the sum of two angles is 60°, then what will be the measure of third angle? | # In a triangle, if the sum of two angles is 60°, then what will be the measure of third angle? | ||
# If a triangle has all three angles are equal in measure, then what will the measure of each angle? | # If a triangle has all three angles are equal in measure, then what will the measure of each angle? | ||
| − | Go back to the page - [ | + | Go back to the page - [https://karnatakaeducation.org.in/KOER/en/index.php/Triangles?veaction=edit§ion=20 click here] |
Revision as of 14:12, 19 December 2020
Objectives
Estimated Time
Prerequisites/Instructions, prior preparations, if any
Materials/ Resources needed
Click here to open the file
Process (How to do the activity)
Download this geogebra file from this link.
- Students should be able to recognize the corresponding angles formed when the parallel line is drawn.
- Students should be able to recognize the alternate angles formed. Is the alternate angle same as one of the angles of the triangle.
- Ask students what happens when the three angles of the triangle are placed adjacent to each other.
- What can you say about the line drawn?
- Is it parallel to one of the sides?
- What can you say about the pairs of angles – look at the matching colors.
- Once the parallel line reaches the vertex, how many angles are formed?
- Students should be able to identify the two angles moving are corresponding angles as the line moving is parallel to one of the sides.
- Students can see that when the three angles of the triangle are placed adjacent to each other they form a straight line.
Evaluation at the end of the activity
- In a triangle, if the sum of two angles is 60°, then what will be the measure of third angle?
- If a triangle has all three angles are equal in measure, then what will the measure of each angle?
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