Types of Triangles

Triangles always have...

• 2 sides

• 3 sides

• 4 sides

• 5 sides

Tri in latin means...

• try

• three

• four

• ten

What is special about an equilateral triangle?

• has no equal sides

• has two equal sides

• has three equal sides

• the angles add up to 180 degrees

What is special about an isosceles triangle?

• has no equal sides

• has two equal sides

• has three equal sides

• the angles add up to 180 degrees

What is special about a scalene triangle?

• has no equal sides

• has two equal sides

• has three equal sides

• the angles add up to 180 degrees

What is special about an acute triangle?

• all angles are less than 90 degrees

• one angle is exactly 90 degrees

• one angle is greater than 90 degrees

• the angles add up to 180 degrees

What is special about an obtuse triangle?

• all angles are less than 90 degrees

• one angle is exactly 90 degrees

• one angle is greater than 90 degrees

• the angles add up to 180 degrees

What is special about a right triangle?

• all angles are less than 90 degrees

• one angle is exactly 90 degrees

• one angle is greater than 90 degrees

• the angles add up to 180 degrees

Which triangle below is also an isosceles acute triangle?

• A

• B

• C

• D

Which triangle below is also an scalene right triangle?

• A

• B

• C

• D