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Classifying Triangles

Total questions: 48

Worksheet time: 12hrs 0mins

Name
Class
Date
1.
Look at the sides of this triangle. What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
2.
Look at the sides of this triangle. What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
3.
Look at the sides of this triangle. What type of triangle is this?
a)
Equilateral
b)
Isosceles
c)
Scalene
d)
Obtuse
4.

What type of triangle is shown?

a)

Isosceles

b)

Right-angled

c)

Equilateral

d)

Scalene

5.

In an ______________ triangle, all three angles are less than 90 degrees.

a)

acute

b)

right

c)

obtuse

d)

360 degrees

6.

In a ____________ triangle one angle is exactly 90 degrees.

a)

acute

b)

right

c)

obtuse

d)

360 degrees

7.

In an ___________ triangle one angle is greater than 90 degrees.

a)

acute

b)

right

c)

obtuse

d)

360 degrees

8.

What kind of triangle is this? Name it for its angles.

a)

acute

b)

obtuse

c)

right

9.

What kind of triangle is this?

a)

acute

b)

right

c)

obtuse

d)

360 degrees

10.

What kind of triangle is this?

a)

acute

b)

right

c)

obtuse

d)

360 degrees

11.
A triangle has angle measurements of 26°, 59°, and 95°. What kind of triangle is it?
a)
acute triangle
b)
right triangle
c)
obtuse triangle
d)
none of the above
12.
A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is it?

a)
acute triangle
b)
right triangle
c)
obtuse triangle
d)
none of the above
13.
A triangle has angle measurements of 74°, 90°, and 16°. What kind of triangle is it?

a)
acute triangle
b)
right triangle
c)
obtuse triangle
d)
none of the above
14.
If a triangle has all angles less than 90° and two equal sides, what type of triangle is it?
a)
Acute Isosceles
b)
Acute Scalene
c)
Obtuse Scalene
d)
Obtuse Isosceles
15.
Look at the sides and angles of this triangle. Which type of triangle is pictured?
a)
Equilateral Triangle
b)
Right Isosceles Triangle
c)
Obtuse Scalene Triangle
d)
Obtuse Equilateral Triangle
16.
If a triangle has one angle greater than 90° and no equal sides, what type of triangle is it?
a)
Acute Isosceles
b)
Acute Scalene
c)
Obtuse Scalene
d)
Obtuse Isosceles
17.
If a triangle has one angle exactly 90° and two equal sides, what type of triangle is it?
a)
Right Isosceles
b)
Acute Scalene
c)
Obtuse Scalene
d)
Obtuse Isosceles
18.
If a triangle has all three angles equivalent and all three sides equivalent, what type of triangle is it?
a)
Acute Isosceles
b)
Equilateral
c)
Obtuse Scalene
d)
Obtuse Isosceles
19.
Classify the following Triangle
a)
Right Isosceles Triangle
b)
Acute Isosceles Triangle
c)
Right  Scalene Triangle
d)
Acute Scalene Triangle
20.
Classify the following Triangle
a)
Right Isosceles Triangle
b)
Obtuse Isosceles Triangle
c)
Right Scalene Triangle
d)
Acute Scalene Triangle
21.
Classify the following Triangle
a)
Right Isosceles Triangle
b)
Obtuse Isosceles Triangle
c)
Right Scalene Triangle
d)
Acute Scalene Triangle
22.
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
23.
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
24.
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
25.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Right Isosceles Triangle
c)
Acute Equilateral Triangle
d)
Obtuse Isosceles Triangle
26.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Right Isosceles Triangle
c)
Right Scalene Triangle
d)
Obtuse Isosceles Triangle
27.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Acute Isosceles Triangle
c)
Right Scalene Triangle
d)
Obtuse Isosceles Triangle
28.
Classify the following Triangle
a)
Acute Scalene Triangle
b)
Acute Isosceles Triangle
c)
Right Scalene Triangle
d)
Obtuse Isosceles Triangle
29.

Classify this triangle.

a)

obtuse

b)

right

c)

acute

30.

Classify this triangle

a)

right

b)

obtuse

c)

acute

31.

Classify this triangle.

a)

right

b)

acute

c)

obtuse

32.

Classify this triangle.

a)

obtuse

b)

right

c)

acute

33.

Classify this triangle.

a)

acute

b)

right

c)

obtuse

34.

Classify this triangle.

a)

right

b)

acute

c)

obtuse

35.

Classify this triangle.

a)

acute

b)

right

c)

obtuse

36.
What type of angle is shown?
a)
acute
b)
obtuse
c)
right
d)
straight
37.
Classify the triangle by its angles.
a)
Acute Triangle
b)
Right Triangle
c)
Obtuse Triangle
38.
True or False
An obtuse triangle has 1 obtuse angle.
a)
True
b)
False
39.

Classify this triangle by its angles

a)

Acute

b)

Obtuse

c)

Equilangular

d)

Right

40.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
41.
a)

acute

b)

obtuse

c)

right

42.
When classifying a triangle by its angles, what type of triangle has one right angle? 
a)
acute triangle
b)
right triangle
c)
obtuse triangle
d)
none of the above
43.

Classify this triangle by its angles

a)

Acute

b)

Right

c)

Obtuse

44.
a)
parallel lines
b)
perpendicular lines
c)
intersecting lines
d)
a ray
45.

What is this?

a)

Points

b)

Dots

c)

Lines

d)

Line segment

46.

What is this?

a)

Line segments

b)

line

c)

point

d)

end caps

47.
Baymax's eyes make a...
a)
Line
b)
Line segment
c)
Ray
d)
Angle
48.
What is this?
a)
Angle
b)
Line
c)
Line Segment
d)
Ray

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