Lesson as an example of AOM

1. Dr Madhavi Dharankar
Std: Six Sub: Geometry
Types of Triangles

2. There are various
types of triangles
based on sides and
angles.
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3. Based on Sides Based on Angles
• Equilateral
triangle
• Isosceles
triangle
• Scalene
triangle
• Acute angle
triangle
• Right angle
triangle
• Obtuse angle
triangle
Types of Triangles
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4. Types of Triangles based on
Sides
Equilateral
• Three sides
same
• Three
angles
same (60)
Isosceles
• Two sides
same
• Two
angles
same
Scalene
• All the
three sides
different
• All the
three angles
different
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5. Types of Triangles based on
Angles
Acute
• Three angles
acute
• All acute angles
same or two
acute angles
same or all three
angles different
Right
• One angle right
and two angles
acute
• Two acute
angles same or
two acute
angles different
Obtuse
• One angle
obtuse and two
angles acute
• Both acute
angles same or
both acute
angles different
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6. Types of Triangles based on
Sides - Connection
Equilateral Isosceles Scalene
Number of
Same
angles
Three (60)
Two
Zero
Number of
same Sides
Three
Acute √
√Right
X
Obtuse
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7. Types of Triangles based on
Angles - Connection
Acute Right Obtuse
Number of
Acute angles
Three (60) two
Non-acute
angles
Zero One angle right One angle
obtuse
Comparisons
of Acute
angles
All acute angles
same or
two acute
angles same or
all three angles
different
Two acute
angles same or
two acute
angles different
Both acute
angles same
or
both acute
angles
different
Equilateral √ X
Isosceles
√
Scalene
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8. A Few Questions
• How could we name these triangles
differently?
• Can we challenge our beginning statement
“There are various types of triangles based
on sides and angles”?
• What could be some other ways of
classifying the triangles?
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