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Triangles and the Lengths of Their Sides
1. Triangles can be named according to the number of equal sides that

they have. Determine whether the following triangles are equilateral,
isosceles, or scalene.

3 cm 3 cm 4 cm 4 cm 2 cm

3 cm

3 cm 3 cm 4 cm
3 equal sides 2 equal sides 0 equal sides

equilateral triangle isosceles triangle scalene triangle

a. 4 cm b. 6 cm c. 4 cm
4 cm 4 cm 11 cm 3 cm 6 cm
6 cm

d. 3 cm e. f. 2 cm
3 ft
3 ft 5 cm

3 cm 3 cm 5 cm

2 ft

g. h. i. 5 ft
5 ft
5 in. 2 cm 3 cm 5 ft
4 in.
2 in.

4 cm