8 special quadrilaterals

• square
• rhombus
• rectangle
• kite
• trapezium (trapezoid)
• arrowhead
• isosceles trapezium
• parallelogram

play 'guess my shape':

"I am thinking of one of these eight shapes
you can ask questions to find out which one it is but I can only answer yes or no to a question."

"What questions do you want to ask?"

"Now you have to try to find out my shape quickly - what questions do you want to ask?

"You can actually identify the shape in at most three questions.
What question do you ask first?"

one step difference:

can you put these into a line so that there is just one difference in shape properties between them?
e.g a rhombus or a rectangle could be placed next to a square