Question

Look at the four triangles below.



Which option shows the triangles correctly classified by their sides and by their angle measures?
By Side

2 and 4 are scalene triangles because each has all three sides of different lengths.

By Angle

1 and 3 are acute triangles because each has at least two angles that measure less than 90˚.

Answer 1

By Side

1, 3, and 4 are isosceles triangles because each has all three sides that are of the same length.

By Angle

2 and 4 are right triangles because each has one angle that measures 90˚.

Answer 2

By Side

1 and 3 are equilateral triangles because each has at least two sides that are of the same length.

By Angle

2 and 4 are obtuse triangles because each has two angles that measure less than 90˚.

Answer 3

By Side

1, 3, and 4 are isosceles triangles because each has at least two sides that are of the same length.

By Angle

2 and 4 are right triangles because each has one angle that measures 90˚.

Answer 4

These are all the answer choices