Classifying Triangles

What type of triangle has all angles less than 90 degrees?

• Acute triangle

• Obtuse triangle

• Right triangle

• Scalene triangle

Tags

CCSS.4.G.A.2

What is an equilateral triangle?

• A triangle where all three sides and all three angles are equal.

• A triangle with one angle greater than 90 degrees.

• A triangle that has two sides of equal length.

• A triangle where all sides are different lengths.

Tags

CCSS.4.G.A.2

What is an acute triangle?

• A triangle where all three angles are less than 90 degrees.

• A triangle with one angle greater than 90 degrees.

• A triangle with all angles equal to 90 degrees.

• A triangle with two angles less than 90 degrees and one angle equal to 90 degrees.

Tags

CCSS.4.G.A.2

What is an obtuse triangle?

• A triangle where all angles are less than 90 degrees.

• A triangle where one angle is exactly 90 degrees.

• A triangle where one angle is greater than 90 degrees.

• A triangle where all sides are equal.

Tags

CCSS.4.G.A.2

What is the sum of the angles in any triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 270 degrees

Tags

CCSS.8.G.A.5

How do you classify triangles based on angles?

• Acute, right, or obtuse

• Equilateral, isosceles, or scalene

• Congruent, similar, or asymmetric

• Obtuse, reflex, or straight

Tags

CCSS.4.G.A.2

What is an isosceles triangle?

• A triangle that has at least two sides of equal length.

• A triangle with all sides of different lengths.

• A triangle that has one right angle.

• A triangle with all sides equal.

Tags

CCSS.4.G.A.2

What is a right triangle?

• A triangle that has one angle equal to 90 degrees.

• A triangle with all sides of equal length.

• A triangle that has no equal sides.

• A triangle where the sum of the angles is less than 180 degrees.

Tags

CCSS.4.G.A.2

If a triangle has one angle greater than 90 degrees, what type of triangle is it?

• Acute triangle

• Right triangle

• Obtuse triangle

• Equilateral triangle

Tags

CCSS.4.G.A.2

What is a straight angle?

• An angle that is equal to 90 degrees.

• An angle that is equal to 180 degrees.

• An angle that is less than 90 degrees.

• An angle that is greater than 180 degrees.

Tags

CCSS.4.G.A.1