Classifying Triangles

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle measuring more than 90 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is an acute triangle?

Back

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

Front

What defines an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal, each measuring 60 degrees.

Front

Can a triangle be both obtuse and isosceles?

Back

Yes, a triangle can be both obtuse and isosceles if it has one angle greater than 90 degrees and two sides of equal length.

Front

What is the sum of the angles in any triangle?

Back

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

Front

How can you identify an isosceles triangle?

Back

An isosceles triangle can be identified by its two equal sides and the angles opposite those sides being equal.

Front

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

Back

In an isosceles triangle, the angles opposite the equal sides are also equal.

Front

What is the difference between acute and obtuse triangles?

Back

The difference is that acute triangles have all angles less than 90 degrees, while obtuse triangles have one angle greater than 90 degrees.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides and all three angles are different.