Identify triangles by sides and angles.

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 an equiangular triangle?

Back

A triangle where all three angles are equal, each measuring 60 degrees.

Tags

CCSS.4.G.A.2

Front

How do you find the measure of the third angle in a triangle?

Back

Subtract the sum of the two known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

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 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 defines a triangle as acute isosceles?

Back

An acute triangle with two sides of equal length.

Tags

CCSS.4.G.A.2

Front

What defines a triangle as right scalene?

Back

A right triangle with all sides of different lengths.

Tags

CCSS.4.G.A.2