Classify Triangles

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring exactly 90 degrees.

Front

What is an equilateral triangle?

Back

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

Front

What is a scalene triangle?

Back

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

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and the angles opposite those sides are equal.

Front

How do you classify triangles based on angles?

Back

Triangles can be classified as acute (all angles less than 90 degrees), right (one angle equal to 90 degrees), or obtuse (one angle greater than 90 degrees).

Front

How do you classify triangles based on side lengths?

Back

Triangles can be classified as equilateral (all sides equal), isosceles (two sides equal), or scalene (all sides different).

Front

What type of triangle has one right angle?

Back

A right triangle has one right angle.

Front

If a triangle has sides of lengths 5 cm, 5 cm, and 8 cm, what type of triangle is it?

Back

It is an isosceles triangle.

Front

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

Back

An acute triangle has all angles less than 90 degrees.