Everyday angles

Everyday angles

Auto-markingPencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about identifying the size of some angles.

Question 1Change answer

a)  Power pylons are strengthened with steel bars that cross over each other.
 
steel bars on a a power pylon
 
An angle between two of the steel bars is 70°. 
     What is the size of 
     i)   angle y?  °  
     ii)  angle z?  °

Question 1Change answer

b)  A wind-turbine can have a 3- or 5-bladed propeller.
     The angles between the blades on each propeller are always equal.
 
3 bladed wind turbine
     What is the size of each angle on a ...
     i)   3-bladed propeller?      ° 
     ii)  5-bladed propeller?      °
Task administration: 
This task can be completed with pencil and paper or online (with auto marking displayed to students).
Level:
4
Curriculum info: 
Maths, Geometry and Measurement, Shape
Keywords: 
angles, opposite angles, adjacent angles
Description of task: 
Students use their knowledge of vertically opposite angles, adjacent angles on a straight line, and angles at a point to identify unknown angles in everyday shapes.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Geometric thinking, sets 4-5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
  Y8 (11/1998)
a) i)
ii)		 70
110		 easy
moderate
b) i)
ii)		 120
72		 easy
moderate
Diagnostic and formative information: 
  Common error Likely reason
a) ii) 140 Doubles 70°
b) ii) 90 Answer for 4 bladed propeller.