5th Grade 5.5A Classify 2D

Front

What is a right triangle?

Back

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

Front

What are the three types of triangles based on side lengths?

Back

The three types of triangles based on side lengths are equilateral, isosceles, and scalene.

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 to 60 degrees.

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

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

How can triangles be classified 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

What is the sum of the angles in any triangle?

Back

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

Front

What is the relationship between the sides and angles in a triangle?

Back

In a triangle, the larger the angle, the longer the opposite side.

Front

What is a diagram that shows relationships among triangles called?

Back

A diagram that shows relationships among triangles is called a classification diagram.

Front

What is the difference between an equilateral triangle and an isosceles triangle?

Back

An equilateral triangle has all sides equal, while an isosceles triangle has at least two sides equal.