Types of Triangles

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle equal to 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle where one angle is greater than 90 degrees.

Tags

CCSS.4.G.A.2

Front

How can you identify an acute triangle?

Back

You can identify an acute triangle by measuring its angles; if all angles are less than 90 degrees, it is acute.

Tags

CCSS.4.G.A.2

Front

How can you identify a right triangle?

Back

You can identify a right triangle by checking if one of its angles is exactly 90 degrees.

Tags

CCSS.2.G.A.1

Front

How can you identify an obtuse triangle?

Back

You can identify an obtuse triangle by measuring its angles; if one angle is greater than 90 degrees, it is obtuse.

Tags

CCSS.4.G.A.2

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

Can a triangle have more than one obtuse angle?

Back

No, a triangle cannot have more than one obtuse angle because the sum of the angles would exceed 180 degrees.

Tags

CCSS.4.G.A.2

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle has all sides of equal length and all angles equal to 60 degrees.

Tags

CCSS.4.G.A.2

Front

What type of triangle has two sides of equal length?

Back

An isosceles triangle has two sides of equal length and the angles opposite those sides are equal.

Tags

CCSS.4.G.A.2