Classifying triangles

Front

What is an acute triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is a scalene triangle?

Back

A triangle where all three sides are of different lengths.

Tags

CCSS.4.G.A.2

Front

What is an isosceles triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

A triangle where all three sides are of equal length and all angles are 60 degrees.

Tags

CCSS.4.G.A.2

Front

How can you identify a right triangle?

Back

By checking if one of its angles measures exactly 90 degrees.

Tags

CCSS.2.G.A.1

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

What is the relationship between the angles in an obtuse triangle?

Back

In an obtuse triangle, one angle is greater than 90 degrees, and the other two angles are less than 90 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

An acute triangle.

Tags

CCSS.4.G.A.2