Classifying triangle by sides and angles

Classify the triangle by its sides.

• Equilateral

• Isosceles

• Scalene

True or False.
An acute triangle has 3 acute angles.

• True
• False

True or False.
A right, isosceles triangle has 1 right angle and 2 equal sides.

• True 
• False

True or False.
A right triangle has 2 right angles. 

• True
• False

Classify the triangle by its angles.

• Acute Triangle
• Right Triangle
• Obtuse Triangle

Classify the triangle by its sides. 

• Equilateral
• Scalene
• Isosceles

True or False
An obtuse triangle has 1 obtuse angle.

• True
• False

Look at the triangle pictured. 
What do the lines (sticks) mean on a shape?

• The lines (sticks) show sides that are equal
• The lines (sticks) show sides that are not equal

• acute
• obtuse
• right
• equiangular

An isosceles triangle has _________ equal sides.

• one

• two

• three

• four