Name the following triangle in two different ways: (you may judge the nature of the angle by observation)


 

Name the following triangle in two different ways: (you may judge the nature of the angle by observation)

Try to construct triangles using match sticks. Some are shown here. Can you make a triangle with
$3$ matchsticks?
(Remember you have to use all the available matchsticks in each case)
Name the type of triangle in each case.
If you cannot make a triangle, think of reasons for it.