Everyday angles

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?      °
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