When two sides of a polygon meet they form an angle. Look at the
figure below. The segments AB and BC form the angle ABC.
The vertex of angle ABC is at point B.
The polygon below has four sides, four angles, and four vertexes.
A right angle is an angle that forms a square corner.
A right angle must be a 90
degree angle. The triangle below has a right angle. Every square and rectangle
has four right (90 degree) angles.
Complete each question or statement below.
In the angle above, what point is the vertex?
Point
The angle above could be called angle C.
The polygon above has
vertexes.
The polygon above has
angles.
The polygon above has
sides.
The square above has
right angles.
The polygon above has one angle called DC.
The angle above could be called angle X.
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