Triangle Classification

Can the following 3 numbers be side measures of a triangle

• Yes

• No

Which would be the best classification for the triangle shown?

• acute isosceles

• equiangular scalene

• equiangular isosceles

• equiangular equilateral

Which would be the best classification for the triangle shown?

• acute isosceles

• obtuse scalene

• obtuse isosceles

• acute scalene

Which would be the best classification for the triangle shown?

• right isosceles

• obtuse scalene

• obtuse isosceles

• right scalene

TRIANGLES....based on SIDES and ANGLES

c

b

d

e

f

a

RIGHT

OBTUSE

SCALENE

EQUILATERAL

ACUTE

ISOSCELES

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

This is a right triangle because —

• it is facing the right way

• it has 3 acute angles

• it has one 90 degree angle

• it does not have one obtuse angle

Classify the triangle by its angle measures ​ (a)   and side lengths ​ (b)  

• right

• Scalene

• obtuse

• acute

• equilateral

• isosceles

• equiangular

Classify the triangle by its angles and its sides.

The name based on the sides is ​ (a)   .

The name based on the angles is ​ (b)   .

• Scalene

• Right

• Acute

• Equilateral

• Obtuse

• Isosceles

A right triangle is...

• a triangle with a 90 degree angle

• a triangle with all angles less than 90 degrees

• a triangle with an angle bigger than 90 degrees