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Each of the following shapes has a value

triangle 4
circle 8
rectangle 15

What is the total value of the following two shapes when you put them together?

circle rectangle

How about these? triangle circle circle
Tell us about this triangle rectangle triangle
   

Use a combination of shapes to show the following values. Can you find more than one way to show the values?
20, 27, 35, 36, 50, 66 and 100

Can you find some numbers between 5 and 50 that cannot be made using these shapes?