If the sides of a triangle are 4, 4 and 7 units

Question

If the sides of a triangle are 4, 4 and 7 units respectively, then which of the following is true? 

The triangle is a right isosceles triangle 
The triangle is an acute angled isosceles triangle 
The triangle is an obtuse angled isosceles triangle 
The 3 points are collinear 
None of these

HIMALAYA · Answer

The triangle is an obtuse angled isosceles triangle

vikramm · Answer

The triangle is an obtuse angled isosceles triangle 

7 > 4.. so picturize the triangle with the angle between the two equal sides > 90.

Antmavel · Answer

agree with obtuse

if you don't know how to solve it, use your knowledge.
draw a right isoceles triangle, it should be 4,4, and the last side should be squre root(32)
Now we have 7 which is squre root (49), so we know this triangle is not a right triangle but we also know that the side is bigger so the angle has to be bigger than 90 degrees :wink: