Classifying Triangles by Angles & Sides

​Chapter 4 Intro- Classifying Triangles

Some text here about the topic of discussion

​Classifying Triangles by Angles

Some text here about the topic of discussion

Multiple Choice

How many angles does a triangle have?

• 4

• 3

• 2

Multiple Choice

What is an acute angle?

• An angle that measures 90°

• An angle that measures more than 90° and less than 180°

• An angle that measures between 0 and 90°

  Always less than 90°

• An angle that measures more than 180°

Multiple Choice

What is an obtuse angle?

• An angle that measures less than 90°

• An angle that measures exactly 90°

• An angle that measures more than 90° and less than 180°

Multiple Choice

What is a right angle?

• A right angle measures exactly 180°

• A right angle measures exactly 90°

• A right angle is always less than 90°

Multiple Choice

A right triangle must have...

• 1 angle that equals 90° (right angle).

• more than 3 angles.

• two right angles.

Multiple Choice

Based on it's angles, what type of triangle is this?

• acute triangle

• obtuse triangle

• right triangle

• equiangular triangle

Multiple Choice

Based on its angles, what type of triangle is this?

• Acute triangle

• Obtuse triangle

• Isosceles triangle

• Right triangle

Multiple Choice

Based on its angles, what type of triangle is this?

• Scalene triangle

• Acute triangle

• Obtuse triangle

• It looks like a roof.

Multiple Choice

A triangle which angles are all 60° is called ...

• an obtuse triangle.

• an acute triangle.

• an equiangular triangle.

​Classifying Triangles by Sides

Some text here about the topic of discussion

Multiple Choice

What are the three types of triangles based on their sides?

• obtuse, acute, and right

• parallel, perpendicular, and rays

• scalene, isosceles, and equilateral

• points, line segments, and lines

Multiple Choice

A scalene triangle is...

• a triangle with four sides.

• a triangle with 3 congruent sides.

• a triangle with more than 3 sides.

• a triangle with no congruent sides.

Multiple Choice

An isosceles triangle is ...

• a triangle with 3 congruent sides.

• a triangle with 4

  congruent sides.

• a triangle with no congruent sides.

• a triangle with at least 2 congruent sides.

Multiple Choice

What is an equilateral triangle?

• A triangle with different sides

• A triangle with four sides that are congruent (same)

• A triangle with two sides that are congruent.

• A triangle with 3 congruent sides.

Multiple Choice

Based on its sides, what type of triangle is this?

• Scalene

• Equilateral

• Isosceles

• Obtuse

Multiple Choice

Based on its sides, what type of triangle is this?

• Isosceles triangle

• Scalene triangle

• Acute triangle

• Equilateral triangle

Multiple Choice

Based on its sides, what type of triangle is this?

• Isosceles triangle

• Obtuse triangle

• Scalene triangle

• Do not choose this answer or you will get it wrong.

Multiple Select

How do you feel about classifying triangles by their sides or angles?

• I can do this ALL DAY.

• I might need a bit of a refresher.

• I'm getting all the words confused

• What are triangles?