Classifying Triangle

A triangle with 2 congruent sides.

(Un triángulo con 2 lados congruentes.)

• Equilateral Triangle

  (Triángulo equilátero)

• Isosceles Triangle

  (Triángulo isósceles)

• Scalene Triangle

  (Triángulo escaleno)

A triangle with one angle measuring more than 90 degrees is known as?

(Un triángulo con un ángulo que mide más de 90 grados se conoce como?)

• Obtuse triangle.

  (Triángulo obtuso.)

• Acute triangle.

  (Triángulo agudo.)

• Right triangle.

  (Triángulo rectángulo.)

LOOKING AT ANGLES: WHAT TYPE OF TRIANGLE IS THIS? HINT: ONE ANGLE = 90 DEGREES

• ACUTE

• OBTUSE

• RIGHT

Label the three triangles

a

b

c

Equilateral Triangle

Scalene Triangle

Isosceles Triangle

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

Classify the following triangle​ .​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ (a)   ​ (b)   ​ (c)   ​

• right triangle

• acute triangle

• obtuse triangle

Classify this triangle.

b

acute equilateral

acute isosceles

obtuse scalene

right scalene

right isosceles

Which triangle is classified as scalene and obtuse?

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• isosceles

• right

• scalene

• obtuse

• equilateral

• acute

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