Triangle can be formed if
OBJECTIVE
To verify that triangle can be drawn if the sum of lengths of any two sides is greater than the third side.
PREREQUISITE KNOWLEDGE
Familiarity with a triangle and its parts.
MATERIALS REQUIRED
1. A scale
2. A gluestick
3 .Paper Sheet
4. Three Sets of broom sticks of following measurements
Set-1. 5cm,7cm,11cm
Set-2. 5cm,7cm,14cm
Set-3. 5cm,7cm,12cm
PROCEDURE
1.Take set-1 of broom sticks
( 5cm,7 cm,11cm) Image 1
Image1
2.Try to make a triangle using broom sticks of Set-1 (Image 2)
Image 2
3.Take other sets ( Set -2,Set-3) of broom sticks and try to form triangle,we observe that
forming of triangle is not possible. (Image3 & Image4)
Image 3
Image 4
OBSERVATION
For set-1
5+7 >11
5+11>7
7+11>5
Triangle can be formed (Image 1)
For set-2
7+14>5
5+14>7
5+7<14 (Not satisfied)
So,triangle can not be formed
For set-3
7+12>5
5+12>7
5+7=12 (Not satisfied)
So,triangle can not be formed
CONCLUSION
So, It is verified that a triangle can be drawn only if the sum of lengths of any two sides
is greater than the third side.
Ok sir
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