Forget making hearts with your hands – that’s so 2012! Triangles and quadrilaterals are the way to go.
This is quicker than getting whiteboards out, can be used as a memory aid and keeps mischievious fingers busy.
Getting started
The basic L shapes (my assistant had been busy with felt tip pens before being photographed).
Isosceles Triangle
Index figures and thumbs together.
Equilateral Triangle
Index figures together, thumbs overlapping.
Rectangle
Index fingers and thumbs joined at 90 degrees.
Parallelogram
As for the rectangle, but opposite angles equal (as opposed to 90 degrees).
Square
Thumbs part way down index fingers at 90 degrees.
Rhombus
As for the square, but opposite angles equal (rather than 90 degrees).
Arrowhead Kite
Index fingers together, thumbs together, all pointing upwards.
Kite
Index fingers pointing up, thumbs pointing down.