You only have 3 choices:
equilateral: all sides would have to be equal. Are they?
isoscelse: two of the sides would have to be equal. Are they?
scalene: all sides are different. Are they?
All you had to know was the names of these terms.
Classify the triangle with sides measuring 11 cm, 5 cm,
and 10 cm.
equilateral
isosceles
scalene
none of the above
2 answers
Obviously you don't know the meanings of all of these terms.
http://www.mathwarehouse.com/geometry/triangles/triangle-types.php
http://www.mathwarehouse.com/geometry/triangles/triangle-types.php