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1-110.

If no sides of a triangle have the same length, the triangle is called scalene (pronounced SCALE-een). However, if the triangle has two sides that are the same length, the triangle is called isosceles (pronounced eye-SOS-a-lees). Use the markings in each diagram below to decide if $ΔABC$ is isosceles or scalene. Homework Help ✎

Assume the diagrams are not drawn to scale.

 a. b. c.

Sides with the same markings mean the lengths are the same.

Isosceles

Scalene

Isosceles