## Characteristics of Triangles

A triangle is a three sided figure formed by joining three line segments together to form angles. The degree of these angles, and the lengths of the lines, are based upon what triangle is formed. 3 of the main triangles are: equilateral, isoscolece, and right.

Equilateral Triangle - Triangle with all 3 sides being the same length and angle measurement. Each angle is 60 degrees.
Isosceles Triangles - triangle with 2 equal sides and angle measurement, all angles are acute.
Right Triangle - Triangle with an angle that is 90 degrees (right angle). All other angle measures are less than 90 degrees.

Angle Measure - Angles can be either straight, right, acute or obtuse. An angle is a fraction of a circle where the whole circle is 360°. A straight angle is the same as half the circle and is 180° whereas a right angle is a quarter of a circle and is 90°. You measure the size of an angle with a protractor.

Congruency - The relation between 2 numbers in which the numbers give the same remainder when divided by a given number.

Orthocenter - The point where the 3 "altitudes" of a triangle meet

Circumcenter - the point where the perpendicular bisectors of a triangle intersect

Centroid - the center of mass of a geometric object of uniform density.

Incenter - the center of the incircle of a triangle or other figure

Brought to you by Jadyn Belliston and Jarrett Sathre

Credits:

Created with images by cogdogblog - "Dusting off Geometry"