23) D

The best way to solve this question is to draw around the given figures to see if all of the three pieces of card can be put together.

A – This figure does not include the square as one of the vertices is missing.

B – A vertex of the isosceles- looking triangle and some vertices of the square are missing.

C – A vertex of the triangle is missing.

D – This is correct as the square, isosceles-looking triangle and the right-angled triangle can all be outlined.

E – The square cannot be outlined.

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