Triangle Properties and Classifications

The video tutorial explains different types of triangles: scalene, isosceles, right, equilateral, obtuse, and acute. It describes their properties, such as side lengths and angle measures, and uses tick marks to indicate side lengths. The tutorial also highlights that a triangle can have multiple classifications, like a right triangle being scalene if all sides are different. The video aims to help viewers understand and identify various triangle types and their characteristics.

Which type of triangle has all sides of different lengths?

• Right

• Scalene

• Equilateral

• Isosceles

Tags

CCSS.2.G.A.1

In an isosceles triangle, how many sides are of equal length?

• None

• Two

• One

• Three

Tags

CCSS.4.G.A.2

What is the defining feature of a right triangle?

• All sides are equal

• All angles are less than 90 degrees

• It has an angle greater than 90 degrees

• It has a 90-degree angle

Tags

CCSS.4.G.A.2

What is true about the sides of an equilateral triangle?

• It has a 90-degree angle

• All sides are different

• All sides are equal

• Two sides are equal

Tags

CCSS.4.G.A.2

What is a common feature of all equilateral triangles?

• They have a 90-degree angle

• All angles are 60 degrees

• They have one angle greater than 90 degrees

• They have two equal sides

Tags

CCSS.4.G.A.2

Which type of triangle has an angle greater than 90 degrees?

• Acute

• Right

• Obtuse

• Equilateral

Tags

CCSS.4.G.A.2

In an acute triangle, what is true about its angles?

• All angles are 90 degrees

• All angles are greater than 90 degrees

• All angles are less than 90 degrees

• It has one angle greater than 90 degrees

Tags

CCSS.4.G.A.2

Can a triangle be both equilateral and acute?

• Yes, because all angles are less than 90 degrees

• No, because equilateral triangles have a 90-degree angle

• No, because acute triangles have all sides different

• Yes, because equilateral triangles have an angle greater than 90 degrees

Tags

CCSS.4.G.A.2

Is it possible for a right triangle to also be scalene?

• Yes, if all sides are different lengths

• No, because right triangles have equal sides

• No, because scalene triangles have a 90-degree angle

• Yes, if it has two equal sides

Tags

CCSS.4.G.A.2

Which statement is true about triangle classifications?

• A triangle can have multiple classifications

• A triangle can only be classified as one type

• Equilateral triangles are always obtuse

• Triangles cannot be both right and scalene

Tags

CCSS.4.G.A.2