Types of Triangles

What is the definition of an equilateral triangle?

• A triangle with two sides of equal length

• A triangle with one acute angle

• A triangle with all three sides of equal length

• A triangle with all three sides of different lengths

How many sides does an isosceles triangle have?

• 4

• 5

• 2

• 3

What is the name of a triangle with one angle greater than 90 degrees?

• Obtuse triangle

• Acute triangle

• Right triangle

• Isosceles triangle

What is the sum of the interior angles of a scalene triangle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

Can a triangle have two right angles? Why or why not?

• No, because a triangle by definition has only one right angle

• Yes, because a triangle can have any number of right angles

• Yes, because all triangles can have two right angles

• No