Classification of Triangles

Classification of Triangles

Dr. Tom Giles

Classification of Triangles

Dr. Tom Giles

Open Ended

What do you know about triangles?

Classification of Triangles by ANGLES

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What type of triangle is A?

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What type of Triangle is C & F?

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What types of triangle is B & E?

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What type of triangle is D?

Classification of Triangles by SIDES

• Isosceles Triangle - Two Congruent Sides

• Scalene Triangle - No Congruent Sides

• Equilateral Triangle - Three Congruent Sides

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What type of triangle is the Pink Triangle

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What type of Triangle is the Yellow triangle?

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What type of triangle is the Green triangle?

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What type of triangle is the Blue triangle?

Triangle Sum Theorem

How do we use all this information about triangles to solve problems?

Multiple Choice

Which would be the best classification for the triangle shown?

• acute isosceles

• right scalene

• acute scalene

• obtuse scalene

Multiple Choice

Which would be the best classification for the triangle shown?

• acute isosceles

• equiangular scalene

• equiangular isosceles

• equiangular equilateral

Multiple Choice

Which would be the best classification for the triangle shown?

• acute isosceles
• obtuse scalene
• obtuse isosceles
• acute scalene

Multiple Choice

Which would be the best classification for the triangle shown?

• right isosceles
• obtuse scalene
• obtuse isosceles
• right scalene

Multiple Choice

Which would be the best classification for the triangle shown?

• right isosceles
• obtuse scalene
• obtuse isosceles
• acute scalene

Multiple Choice

What is the value of the missing angle?

• 61
• 50
• 60
• 69

Multiple Choice

What is the value of x?

• 60
• 5
• 10
• -3

Multiple Choice

What is the value of x?

• 10
• 5
• -12
• 9

Multiple Choice

What is the value of x?

• 64
• 46
• 127
• 38

Multiple Choice

What is the value of x?

• 75
• 80
• 63
• 60

Multiple Choice

What is the value of the ANGLE A (not just x)?

• 151
• 68
• 151
• 70

Multiple Choice

What is the value of x?

• 30
• 45
• 47
• 50

Multiple Choice

Which angle is the vertex angle?

• <C
• <A
• <B

Multiple Choice

Which segment is the base?

• Segment AB
• Segment BC
• Segment AC

Multiple Choice

What is the value of x?

• 51
• 49
• 78

Multiple Choice

What is the measure of angle 2?

• 50
• 65
• 115