# Sort the Angles: Acute or Obtuse

In this worksheet, students sort angles into acute or obtuse.

Key stage:  KS 2

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Identify Acute/Obtuse Angles

Difficulty level:

### QUESTION 1 of 10

This worksheet is about spotting acute and obtuse angles.

Example

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

Acute angles: c, d, e.

These are less than 90° (a right angle).

Obtuse angles: a, b, f.

These are more than 90° (a right angle) but less than 180° (a straight line).

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Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a)  (b)  (c)

(d)  (e)  (f)

 a b c d e f acute obtuse

Sort the angles into acute and obtuse.

(a)  (b)  (c)

(d)  (e)  (f)
 a b c d e f acute obtuse
• Question 1

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 2

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 3

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 4

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 5

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 6

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 7

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 8

Sort the angles into acute and obtuse.

(a) (b) (c)

(d) (e) (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees (right angle). Obtuse angles are greater than 90 degrees, but less than 180 degrees (straight line).
• Question 9

Sort the angles into acute and obtuse.

(a)  (b)  (c)

(d)  (e)  (f)

 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than 90 degrees. Obtuse angles are more than 90 but less than 180.
• Question 10

Sort the angles into acute and obtuse.

(a)  (b)  (c)

(d)  (e)  (f)
 a b c d e f acute obtuse
EDDIE SAYS
Acute angles are less than a right angle. Obtuse angles are more than a right angle but less than a straight line.
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