Download Types of Triangles

Classified by angles:
 Acute triangle – has
 Right triangle – has
 Obtuse triangle – has
Classified by sides:
 Scalene triangle – has
 Isosceles triangle – has
 Equilateral triangle – has
angles.
angle.
angle.
sides.
sides.
sides.
Acute
Triangles
Right
Triangles
Obtuse
Triangles
Scalene
Triangles
Isosceles
Triangles
Equilateral
Triangles
Can be
scalene.
Can be
scalene.
Can be
scalene.
Can be
acute.
Can be
acute.
Are
ALWAYS
acute.
Can be
isosceles.
Can be
isosceles.
Can be
isosceles.
Can be
right.
Can be
right.
Are NEVER
right.
Can be
equilateral.
Are NEVER
equilateral.
Are NEVER
equilateral.
Can be
obtuse.
Can be
obtuse.
Are NEVER
obtuse.
•
have three acute angles.
•
are scalene if all the acute
angles are different.
•
are isosceles if two of the
acute angles are equal.
•
is equilateral if all of the
acute angles are equal.
•
that are equilateral have
three 600 angles.
•
have one right angle and
two acute angles.
•
are scalene if all of the
angles are different.
•
are isosceles if two of the
sides are congruent.
•
that are isosceles have two
450 angles.
•
have one obtuse angle
and two acute angles.
•
are scalene if all of the
angles are different.
•
are isosceles if two of
the angles are the
same.
•
Have no congruent
sides and no
congruent angles.
•
Can be right if they
have a right angle.
•
have two congruent
sides and two
congruent angles.
•
that are right have a
900 angle and two 450
degree angles.
•
have three equal sides.
•
are always acute
triangles.
•
have three equal acute
angles.
•
have three 600 angles.
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