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Geometry: How Many Right Angles?

In this worksheet, students state which of the quadrilaterals and triangles shown have right angles (angles of 90 degrees).

'Geometry: How Many Right Angles?' worksheet

Key stage:  KS 2

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Identify Acute/Obtuse Angles

Difficulty level:  

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Worksheet Overview

QUESTION 1 of 10

This worksheet is about right angles found in simple shapes.

 

Example

Which of these shapes are quadrilaterals with no right angles.

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h

 

Answer

Remember that the corner of a rectangular piece of paper is a right angle.  

Use this to help.

Quadrilaterals have four sides.

Triangles have three sides.

The answer is a, d and e.

 

Want to understand this further and learn how this links to other topics in maths?
Why not watch this video?

 

Which triangles are right angled?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
a

b

c

d

e

f

g

h

Which triangles are not right angled?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
a

b

c

d

e

f

g

h

Which quadrilaterals contain no right angles?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
a

b

c

d

e

f

g

h

Which quadrilaterals contain at least one right angle?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
a

b

c

d

e

f

g

h

Which of these are quadrilaterals with at least one right angle?

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
a

b

c

d

e

f

g

h

Choose the quadrilaterals which have no right angles.

 

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h

 

a

b

c

d

e

f

g

h

Choose the triangles which do not have a right angle.

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
a

b

c

d

e

f

g

h

Which are the right angled triangles?

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
a

b

c

d

e

f

g

h

Which of these are right angled triangles?

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h
a

b

c

d

e

f

g

h

Which of these shapes are not right angled triangles?

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h
a

b

c

d

e

f

g

h

  • Question 1

Which triangles are right angled?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
CORRECT ANSWER
a
b
EDDIE SAYS
A and B have 90 degree angles.
  • Question 2

Which triangles are not right angled?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
CORRECT ANSWER
d
e
f
EDDIE SAYS
A and B have right-angles.
  • Question 3

Which quadrilaterals contain no right angles?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
CORRECT ANSWER
c
g
EDDIE SAYS
The parallelogram and trapezoid do not have right angles.
  • Question 4

Which quadrilaterals contain at least one right angle?

 

Triangle
a
Right-angled triangle
b
Parallelogram
c
Triangle
d
Triangle
e
Triangle
f
Trapezoid
g
Rectangle
h
CORRECT ANSWER
h
EDDIE SAYS
Rectangles have 4 right angles.
  • Question 5

Which of these are quadrilaterals with at least one right angle?

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
CORRECT ANSWER
b
EDDIE SAYS
Rectangles have 4 right angles.
  • Question 6

Choose the quadrilaterals which have no right angles.

 

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h

 

CORRECT ANSWER
a
e
f
g
EDDIE SAYS
The trapezoid, rhombus and parallelogram do not have right angles.
  • Question 7

Choose the triangles which do not have a right angle.

 

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
CORRECT ANSWER
c
d
EDDIE SAYS
C and D do not have 90 degree angles.
  • Question 8

Which are the right angled triangles?

Shape
a
Rectangle
b
Triangle
c
Triangle
d
Trapezoid
e
Parallelogram
f
Rhombus
g
Triangle
h
CORRECT ANSWER
h
EDDIE SAYS
H has a 90 degree angle.
  • Question 9

Which of these are right angled triangles?

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h
CORRECT ANSWER
f
h
EDDIE SAYS
H and F have 90 degree angles.
  • Question 10

Which of these shapes are not right angled triangles?

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h
CORRECT ANSWER
a
b
c
d
e
g
EDDIE SAYS
Only F and H are right-angled triangles.
---- OR ----

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