What's happening?
Shapes are added to other shapes. Can you see what is happening? What is the rule?
Problem
We started with this pentagon.
Added a triangle:
Then another one:
What would come next, and why?
Can you invent something like these for your friends to solve?
Getting Started
What is the difference between the first shape and the second shape?
Where has the extra piece been added?
Student Solutions
From group 3, ict 2 pere at Olongapo City National High School, Ict in the Philippines, we had the following picture as a suggestion for the completion.
We had, from Harry at Stonebroom, the following:
I think that every side will have a triangle to make it a star
and from Ayesha from Gag in Pakistan we received this similar suggestion:
On the plan side we will add a triangle because it will be in the same form
from every side
Teachers' Resources
Why do this problem?
Possible approach
Key questions
Possible support