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Identifying and Classifying Triangles

Total questions: 25

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
True or False.
An acute triangle has 3 acute angles.
a)
True
b)
False
2.
Classify the triangle by angles and sides.
a)
Right Scalene
b)
Acute Isosceles
c)
Obtuse Isosceles
d)
Equiangular Equilateral
3.
Classify the triangle by angles and sides.
a)
Equiangular Equilateral 
b)
All of the above
c)
Acute Equilateral 
d)
Acute Isosceles
4.
Classify the triangle by angles and sides.
a)
Right Scalene
b)
Right Isosceles
c)
Acute Isosceles
d)
Right Obtuse
5.
Classify the triangle by angles and sides.
a)
Obtuse Scalene
b)
Obtuse Isosceles
c)
Acute Isosceles
d)
Equiangular Scalene
6.
Classify the triangle by angles and sides.
a)
Obtuse Scalene
b)
Obtuse Isosceles
c)
Right Scalene
d)
Acute Isosceles
7.
Classify the triangle by angles and sides.
a)
Equiangular Equilateral
b)
Right Isosceles
c)
Right Scalene
d)
Acute Isosceles
8.
Classify the triangle by angles and sides.
a)
Equiangular Scalene
b)
Acute Scalene
c)
Acute Equilateral
d)
None of the above
9.
Classify the triangle by angles and sides.
a)
Right Scalene
b)
Equiangular Equilateral
c)
Obtuse Isosceles
d)
None of the above
10.

What are the two ways to classify triangles?

a)

By the angles and number of sides

b)

By the angles and side lengths

c)

By the side lengths and the size of the triangle

d)

By the angles and the how many points

11.

A triangle can be classified as an isosceles triangle if there are two equal sides.

a)

True

b)

False

12.

Which term is the classification of a triangle by an angle less than 90 degrees?

a)

scalene

b)

equilateral

c)

acute

d)

right

13.

What are the three ways to classify triangles by their sides?

a)

equilateral, right, isosceles

b)

scalene, obtuse, right

c)

equilateral, isosceles, scalene

d)

acute, right, isosceles

14.

A triangle with all equal sides and one 90 degree angle is what kind of triangle?

a)

acute equilateral

b)

right equilateral

c)

right scalene

d)

acute isosceles

15.
What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
16.
Which type of triangle is pictured?
a)
Equilateral Triangle
b)
Right Isosceles Triangle
c)
Obtuse Scalene Triangle
d)
Obtuse Equilateral Triangle
17.
Classify the following triangle in as many ways as possible. 
a)
Isosceles, Acute
b)
Isosceles, Obtuse
c)
Scalene, Obtuse
d)
Equilateral, Acute
18.
a)
obtuse scalene
b)
right isosceles
c)
scalene acute
d)
acute isosceles
19.
Classify the triangle by angles and sides.
a)
Right Scalene
b)
Equiangular Equilateral
c)
Obtuse Isosceles
d)
None of the above
20.

Identify the triangle by its sides and angles

a)

Equilateral

b)

Obtuse Equilateral

c)

Acute Equilateral

d)

Acute Isosceles

21.

Identify the triangle by its sides and angles

a)

Right Isosceles

b)

Right Scalene

c)

Obtuse Isosceles

d)

Obtuse Scalene

22.

Identify the triangle by its sides and angles

a)

Acute Equilateral

b)

Right Equilateral

c)

Acute Isosceles

d)

Obtuse Isosceles

23.

Identify the triangle by its sides and angles

a)

Obtuse

b)

Acute Isosceles

c)

Obtuse Scalene

d)

Obtuse Isosceles

24.

Identify this triangle by its sides

a)

Right

b)

Scalene

c)

Isosceles

d)

Equilateral

25.
Classify the triangle by angles and sides.
a)
Equiangular Equilateral
b)
Right Isosceles
c)
Right Scalene
d)
Acute Isosceles