Classifying Triangles & Triangle Sum Theorem FLASHCARD_SE

Front

What is a triangle?

Back

A polygon with three edges and three vertices.

Front

What are the types of triangles based on sides?

Back

Equilateral, Isosceles, Scalene.

Front

What are the types of triangles based on angles?

Back

Acute, Right, Obtuse.

Front

Define an equilateral triangle.

Back

A triangle with all three sides of equal length.

Front

Define an isosceles triangle.

Back

A triangle with at least two sides of equal length.

Front

Define a scalene triangle.

Back

A triangle with all sides of different lengths.

Front

Define an acute triangle.

Back

A triangle where all angles are less than 90 degrees.

Front

Define a right triangle.

Back

A triangle with one angle equal to 90 degrees.

Front

Define an obtuse triangle.

Back

A triangle with one angle greater than 90 degrees.

Front

What is the Triangle Sum Theorem?

Back

The sum of the interior angles of a triangle is always 180 degrees.