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Triangle Classification Review

Total questions: 41

Worksheet time: 43mins

Name
Class
Date
1.

What is the missing Angle?

4 lines
2.

What is the missing Angle?

4 lines
3.

What is the missing Angle?

4 lines
4.

Based on its sides, what type of triangle is this?

a)

Scalene triangle

b)

Isosceles triangle

c)

A cute little triangle :D

d)

An obtuse triangle

5.

Based on its sides, what type of triangle is this?

a)

Isosceles triangle

b)

Obtuse triangle

c)

Scalene triangle

d)

Do not choose this answer or you will get it wrong.

6.

Based on its sides, what type of triangle is this?

a)

Isosceles triangle

b)

Scalene triangle

c)

Acute triangle

d)

Equilateral triangle

7.

Based on its sides, what type of triangle is this?

a)

Scalene

b)

Equilateral

c)

Isosceles

d)

Obtuse

8.

What is an equilateral triangle?

a)

A triangle with different sides

b)

A triangle with four sides that are congruent (same)

c)

A triangle with two sides that are congruent.

d)

A triangle with 3 congruent sides.

9.

An isosceles triangle is ...

a)

a triangle with 3 congruent sides.

b)

a triangle with 4

congruent sides.

c)

a triangle with no congruent sides.

d)

a triangle with at least 2 congruent sides.

10.

A scalene triangle is...

a)

a triangle with four sides.

b)

a triangle with 3 congruent sides.

c)

a triangle with more than 3 sides.

d)

a triangle with no congruent sides.

11.

Which one of the following in one type of triangle classified by its sides?

a)

square

b)

quadrilateral

c)

scalene

d)

obtuse

12.

In geometry, we don't use the word equal when two sides are the same. Which word is used instead?

a)

different sides

b)

similar sides

c)

congruent sides

d)

friendly sides

13.

What are the three types of triangles based on their sides?

a)

obtuse, acute, and right

b)

parallel, perpendicular, and rays

c)

scalene, isosceles, and equilateral

d)

points, line segments, and lines

14.
What type of triangle has only acute angles and no congruent sides?
a)
Right Isosceles Triangle
b)
Obtuse Isosceles Triangle
c)
Right Scalene Triangle
d)
Acute Scalene Triangle
15.
What type of triangle has only one right angle and two congruent sides?
a)
Right Isosceles Triangle
b)
Obtuse Isosceles Triangle
c)
Right Scalene Triangle
d)
Acute Scalene Triangle
16.
What type of triangle has only one obtuse angle and two congruent sides?
a)
Right Isosceles Triangle
b)
Obtuse Isosceles Triangle
c)
Right Scalene Triangle
d)
Acute Scalene Triangle
17.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Right Isosceles Triangle
c)
Right Scalene Triangle
d)
Obtuse Isosceles Triangle
18.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Acute Isosceles Triangle
c)
Right Scalene Triangle
d)
Obtuse Isosceles Triangle
19.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

acute scalene

e)

right isosceles

20.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

obtuse scalene

e)

obtuse isosceles

21.

Classify this triangle.

a)

equilateral equiangular

b)

right scalene

c)

acute isosceles

d)

obtuse scalene

e)

obtuse isosceles

22.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

acute scalene

e)

obtuse isosceles

23.

Classify this triangle.

a)

equiangular equilateral

b)

right scalene

c)

acute isosceles

d)

acute scalene

e)

obtuse isosceles

24.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

acute scalene

e)

obtuse isosceles

25.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

acute scalene

e)

obtuse isosceles

26.

Classify this triangle.

a)

acute equilateral

b)

right scalene

c)

acute isosceles

d)

obtuse scalene

e)

obtuse isosceles

27.

90°, 45°, 45°

These could be the angles of a:

a)

right triangle

b)

acute triangle

c)

obtuse triangle

28.

110°, 50°, 20°

These could be the angles of a:

a)

right triangle

b)

acute triangle

c)

obtuse triangle

29.

60°, 60°, 60°

These could be the angles of a:

a)

right triangle

b)

equiangular triangle

c)

obtuse triangle

d)

acute triangle

30.

42°, 42°, 96°

These could be the angles of a:

a)

right triangle

b)

acute triangle

c)

obtuse triangle

31.

14 mm, 14 mm, 32 mm

These could be the sides of a:

a)

equilateral triangle

b)

isosceles triangle

c)

scalene triangle

32.

62 mm, 51 mm, 47 mm

These could be the sides of a:

a)

equilateral triangle

b)

isosceles triangle

c)

scalene triangle

33.

37 ft, 37 ft, 37 ft

These could be the sides of a:

a)

equilateral triangle

b)

isosceles triangle

c)

scalene triangle

34.

Classify the triangle by angle and side.

a)

Obtuse-isosceles

b)

Right-isosceles

c)

Equiangular - equilateral

d)

Acute - right

35.

Classify triangle by angle and side.

a)

Obtuse - Isosceles

b)

Acute - Isosceles

c)

Right - Equilateral

d)

Acute - Equilateral

36.

Classify the triangle by angle and side.

a)

Acute - isosceles

b)

Obtuse - Scalene

c)

isosceles-acute

d)

Obtuse-isosceles

37.
a)

Acute - Isosceles

b)

Right - Scalene

c)

Right - Isosceles

d)

Isosceles - Equilateral

38.

Classify the triangle by angle and side.

a)

Acute - Scalene

b)

Obtuse - Scalene

c)

scalene -isosceles

d)

Obtuse-isosceles

39.

What is the sum of angles in a triangle?

a)

90°

b)

180°

c)

270°

d)

360°

40.

What are the three types of triangles based on their sides?

a)

Equilateral, isosceles, and scalene

b)

Right, acute, and obtuse

c)

Equilateral, acute, and obtuse

d)

Isosceles, right, and obtuse

41.

Which type of triangle has all angles less than 90°?

a)

Acute triangle

b)

Obtuse triangle

c)

Right triangle

d)

Isosceles triangle

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