TRIANGLES

UNIT 06: TRIANGLES

TRIANGLES

A triangle is one of the basic shapes of geometry: a polygon with three corners or vertices and three sides or edges which are line segments.

The sum of all the internal angles in the triangle is 180º.

How to label a triangle

  • The vertices of the triangle are named with capital letters (A, B, C)
  • The sides of the triangle are named with the letter of its opposite vertex (a, b, c)
  • The angles of the triangle are named with the letter of the vertex and angle symbol (^).

Types of triangles

Triangles are classified two ways:

For their SIDES:

Equilateral
Three equal sides and angles.

Isosceles
Two equal sides and angles.

Scalene
No equal sides or angles.

For their INTERNAL ANGLES

Acute
All their angles are ACUTE.

Right
One RIGHT ANGLE.

In right triangles, the sides that form the right angle are called LEGS and the side that faces them is called HYPOTENUSE.

Obtuse
One OBTUSE angle.

 

One thought on “TRIANGLES

  1. Pingback: THIRD TERM | Blog de Educación Plástica y Visual

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s