Question

What type of triangle is shown below ? Also mention whether it is regular or an irregular polygon .

Answer 1

Clearly it is given that one of the angle is 120° which is more than 90° so the triangle is Obtuse angled triangle .

Now we can also see that two angles and their opposite sides are marked as equal , so the triangle is also an isosceles triangle .

As only two sides of the triangle is equal but not the third side , the polygon is said to be an irregular polygon .

Hence the given triangle is Isosceles obtuse angled irregular triangle .