Unit 4 Flashcard: Classifying Triangles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Front

What are the types of triangles based on angles?

Back

1. Acute Triangle: All angles are less than 90 degrees. 2. Right Triangle: One angle is exactly 90 degrees. 3. Obtuse Triangle: One angle is greater than 90 degrees.

Front

What are the types of triangles based on sides?

Back

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

Front

How do you classify a triangle with one angle greater than 90 degrees?

Back

It is classified as an Obtuse Triangle.

Front

What is an acute triangle?

Back

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

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle with no congruent sides.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two congruent sides.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides are equal and all angles are 60 degrees.

Front

If a triangle has one right angle, how is it classified?

Back

It is classified as a Right Triangle.

Front

What is the sum of the angles in any triangle?

Back

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