Classifying Triangles in 4th Grade Math

What should you do before starting the lesson?

• Get a piece of paper and something to write with

• Memorize the names of all triangle types

• Watch another video on triangles

• Draw a triangle from memory

Tags

CCSS.4.G.A.1

What are the sides of an equilateral triangle like?

• All sides are of different lengths

• Two sides are of equal length

• All sides are of equal length

• No sides are equal

Tags

CCSS.2.G.A.1

Which triangle has sides that are all the same length?

• Acute

• Equilateral

• Isosceles

• Scalene

Tags

CCSS.4.G.A.2

How many sides of an isosceles triangle are equal?

• None

• One

• Two

• Three

Tags

CCSS.2.G.A.1

Which triangle has two sides of equal length?

• Equilateral

• Right

• Isosceles

• Scalene

Tags

CCSS.4.G.A.2

What makes a scalene triangle unique?

• It has one right angle

• It has one obtuse angle

• All sides are of equal length

• No sides are of equal length

Tags

CCSS.2.G.A.1

What type of triangle has no equal sides?

• Isosceles

• Equilateral

• Scalene

• Obtuse

Tags

CCSS.4.G.A.2

What type of angles does an acute triangle have?

• One obtuse angle

• Three acute angles

• Two right angles

• Two acute angles and one right angle

Tags

CCSS.4.G.A.2

How many right angles does a right triangle have?

• None

• Three

• Two

• One

Tags

CCSS.4.G.A.2

What is a characteristic of an obtuse triangle?

• It has three obtuse angles

• It has two acute angles and one obtuse angle

• All angles are acute

• It has one right angle

Tags

CCSS.4.G.A.2