Transcript -The word triangle means three angles. - Every triangle has three angles and three sides. - Triangles can be classified according to the length of their.

-The word triangle means
three angles.
- Every triangle has three
angles and three sides.
- Triangles can be classified
according to the length of
their sides or the size of
their angles.
- The sum of all angles in a
triangle equals 180º
- An equilateral triangle has the
same length on all three sides.
-Identical marks on all sides of
the triangles indicates that the
triangle’s side has the same
lengths.
- The angles of a equilateral
triangle are all the same.
-Isosceles triangles have
two sides of the same
length and two angles of
the same size.
- The side that is not the
same length is the base.
- Scalene triangles
have three sides of
different length and
three angles of
different sides.
- A right angle triangle
has one of its angles
equal to 90º (one its
angles is a right angle).
-An acute angle triangle
has all angles smaller
than 90º.
- All three angles are
acute.
-An obtuse angle
triangle has one angle
greater than 90º.
- That is, one angle is
obtuse.
The angles in all
triangles equal
180º.
For Example...
http://www.helpingwithmath.com/by_subjec
t/geometry/geo_worksheets.htm
For each of the following:
1. Label the size of the missing angle
2. Classify as i) right angle ii) acute angle iii)
obtuse angle triangle
3. Classify as i) Equilateral ii) Scalene iii)
Isosceles triangle