# What Types of Triangles There Are

A triangle is a polygon that has 3 angles, and 3 line segments joined end to end. Thus, we can say that a triangle is a polygon, which has 3 sides, 3 angles, 3 vertices, and the sum of all 3 angles of any triangle equals 180°. Sides and angles define the type of triangle.

**5-Minute Crafts** would like to tell you about what types of triangles there are. In the bonus section, we’ll recall some terms from our school geometry course.

### Types of triangles by angle

### Types of triangles by side

### Bonus: Terms that describe the elements of an triangle

- The
**legs**are the sides in a right triangle that form its right angle (90°). - The
**hypotenuse**of a right triangle is the side opposite its right angle. - The
**median**of a triangle is a line segment that joins one of its vertices with the center of the opposite side. - The
**altitude of a triangle**, or**height**, is a line from a vertex to the opposite side, that is perpendicular to that side. - An
**angle bisector**of an angle of a triangle divides the opposite side into 2 segments that are proportional to the other 2 sides of the triangle.

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