Which type of triangle has side measures of 6 cm, 7 cm, and 12 cm and one angle with a measure of 120°?
a. acute isosceles
b. right scalene
c. obtuse equilateral
d. obtuse scalene?
It is neither isosceles or equilateral because the 3 sides are unequal. It has to be obtuse (one angle greater than 90) and scalene (all three sides different).
