Classify Triangles, Quadrilaterals, Polygons

What is a polygon?

• A closed plane figure made up of line segments
• An open plane figure made up of line segments
• A closed plane figure made up of rays
• An open plane figure made up of rays

How many sides does a Triangle have?

• 4
• 3
• 2
• 6

How many sides does a Quadrilateral have?

• 4
• 3
• 6
• 9

Why is a Triangle called Scalene?

• It has two sides that match
• It has three sides that match
• It has no sides that match
• It has four sides that match

Why is a Triangle called a Right Triangle?

• It has 3 right angles
• It has 2 right angles
• It has 1 right angle
• It has 0 right angles

How many sides does a Pentagon have?

• 4
• 3
• 5
• 9

How many sides does an Octagon have?

• 4
• 3
• 9
• 8

Why is a Triangle called Equilateral?

• It has two sides that match
• It has all 3 sides that match
• It has no sides that match
• It has four sides that match

Why is a Triangle called Isosceles?

• It has two sides that match
• It has three sides that match
• It has no sides that match
• It has four sides that match

Why is a Triangle called an Acute Triangle?

• It has 3 acute angles

• It has 2 acute angles

• It has 1 acute angle

• It has 0 acute angles