They equal 180 degrees.
It's the statement that in any triangle, the sum of the lengths of any two sides must be greater or equal to the length of the third side.
Yes, because an isosceles triangle has two equal base angles and two equal sides.
4
Triangle
A 45-45-90degree triangle is classified as an isosceles triangle.
Yes if you mean in degrees
true
true
true
false
true
true
true
the triangle has the greater perimeter
false
false