Midpoint Triangle

'Midpoint Triangle' printed from https://nrich.maths.org/

This short problem is good for encouraging children to visualise and it can be done practically by children who lack confidence.

Which part could be a corner?

Would it be helpful to draw the square on squared paper and cut out the shapes?

Children could try Rearrange the Square as a follow-up problem.

Many children will find it helpful to draw the square on squared paper and cut out the shapes to move around.