Mystery shape
Eleven 2D shapes, one secret card each. Players ask about straight sides, right angles, equal sides, parallel sides and symmetry until only one shape can be the other player's.
When to use it
A maths lesson on the properties of 2D shapes, once pupils know the words. Pairs at the end of the lesson, or one pupil against the computer as a starter. Revision of right angles, parallel sides and symmetry.
What makes it this
Built on the Guess who generator with these changed. Everything else is the default.
- How do players ask?: Your questions
Players tap the questions you write, and every answer is checked against the cards, so it is always right.
In the builder: Cards & questions
- Who answers the questions
The players: the player holding the card taps Yes or No, and a wrong answer is not accepted. The game: answered from the cards at once. Playing alone, the game always answers.
In the builder: How it plays › General
Preview
View only — copy it to play.Mystery shape
Why the example is built this way
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Every question is a property.
How many straight sides, a right angle, all sides the same length, parallel sides, a line of symmetry: the words pupils need, used to narrow down eleven shapes.
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A circle has no straight sides.
So it says no to all sides the same length and to parallel sides, and yes to symmetry. Shapes that would answer every question alike, like an oval next to the circle, were left out, so every card can be found.
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Change the shapes to your lesson.
Copy it and swap in the shapes you teach, or add a question such as all angles the same size. The builder marks any two cards that no question tells apart.
Build it yourself
- 1 Open the Guess who builder and fill in the first tab, Cards & questions.
- 2 Change the settings under What makes it this. Each one says where it is in the builder.
- 3 Share the link with your players, or embed the activity in your own site.
Or skip the building: copy this example and swap in your own content.