Triangles

How are triangles classified?

• equal sides and types of angles

• number of sides and number of angles

• color and size

• angles

An EQUILATERAL triangle has ___________.

• 3 equal sides

• 4 equal sides

• no equal sides

• 2 equal sides

A SCALENE triangle has _____________.

• 3 equal sides

• 4 equal sides

• no equal sides

• 2 equal sides

An ISOSCELES triangle has _____________.

• 3 equal sides

• 4 equal sides

• no equal sides

• 2 equal sides

An ACUTE triangle has ________________.

• 1 acute angle

• 2 acute angles

• 3 acute angles

• no acute angles

An OBTUSE triangle has _____________.

• 1 obtuse angle

• 2 obtuse angles

• 3 obtuse angles

• no obtuse angles

A RIGHT triangle has ___________.

• 1 right angle

• 2 right angles

• 3 right angles

• no right angles

What kind of triangle is this?

• obtuse scalene

• right isosceles

• acute equilateral

• right scalene

What kind of triangle is this?

• right scalene

• right isosceles

• obtuse scalene

• acute isosceles

What kind of triangle is this?

• acute equilateral

• acute scalene

• right isosceles

• obtuse equilateral