Name shapes, fold them to find lines of symmetry, spin them, and complete mirror pictures. Play, solve missions and beat the clock.
Start here. A shape has sides (the straight edges) and corners (where two sides meet). A triangle has 3 sides and 3 corners, a square has 4 and 4. A circle has no straight sides and no corners.
Lines of symmetry. Imagine folding a shape along a line. If the two halves cover each other exactly, the fold line is a line of symmetry. A square has 4 of them. A rectangle that is not a square has only 2. A parallelogram has none, and a circle has endless lines because any line through its center works.
Spinning. Turn a shape a full turn around its center. A square looks exactly the same 4 times (counting the start), so its order of rotational symmetry is 4. A rectangle has order 2. A shape that only looks the same after a full turn has order 1.
Regular or irregular? A regular shape has all sides the same length and all corners the same size, like a square or a regular hexagon. A rectangle has equal corners but its sides are not all equal, so it is irregular.
Try this above. In the workshop, pick the rectangle and press Fold a few times. Then pick the parallelogram and try to fold it. Then spin the hexagon and count how many times it looks the same.
It is a line that cuts a shape into two halves that are exact mirror images. If you fold along the line, the halves sit perfectly on top of each other.
Yes. A square is a special rectangle with four equal sides. In this game, when you are asked to name a shape, the answer is the most specific name, so a square is called a square, and the other choices will never include another name that is also correct.
You can fold it up-and-down or side-to-side through the middle. The diagonals do not work: if you fold along a diagonal, the corners stick out and the halves do not match.
Pick the level, not the age. "Just starting" names basic shapes and checks simple folds. "I know the basics" adds more shapes and counting lines of symmetry. "Challenge me" adds rotational symmetry, regular and irregular shapes, and bigger mirror pictures.
No. It is free and needs no account. Your stars are saved in your own browser.