Can we trust those triangles?! 

In this engaging maths activity, students review 2D shapes and right angles to find the correct key. 

Read the statements made by the characters and use logic and reasoning to eliminate ‘red herring’ characters who are trying to trick you! By combining the statements made by the characters with the Cold Hard Facts at the bottom of the page, students decide which key opens the door.

Right Angles and 2D Shapes Worksheet: Scaffolding and Extension Tips 

This teaching resource can be an engaging maths warm-up exercise, a fast finishers task, or even a fun indoor break activity. 

Students must use their knowledge of 2D shapes and right angles to help solve the mystery.

In addition to individual student work time, use this 2D shapes worksheet as a:

• Maths rotation activity
• Post-lesson exit ticket
• Homework assignment
• Whole-class review (via smartboard)

Not only does this mini-mystery activity help your students with their memory and logical thinking, but it also allows learners to read between the lines.

In addition to solving the worksheet, students can also colour it.  

A Variety of Ways to Prepare This Resource

Because this resource includes an answer sheet, we recommend you print one copy of the entire file. Then, make photocopies of the blank worksheet for students to complete.  

You can also turn this teaching resource into a sustainable activity! Print a few copies on cardstock and slip them into dry-erase sleeves. Students can record their answers with a dry-erase marker, then erase and reuse. 

Additionally, project the worksheet onto a screen and work through it as a class.

Before You Download

Use the dropdown icon on the Download button to choose between the PDF or Google Slides version of this resource. An answer key is also included with this download.

Don’t Stop There

We’ve got more 2D Shapes Teaching Resources to cut down on lesson planning time:  

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Tangram Treats – Task Cards and Templates

Explore the properties of geometric shapes with this set of scaffolded tangram shapes task cards and cut-out tangram templates.

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Let's Sort It! — 2D Shapes and 3D Objects Sorting Activity for Year 2

Play this sorting game when learning about the properties of 2D shapes and 3D objects.

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2D Shape Bingo

Engage your students while consolidate learning about 2D shapes, their names and properties with 2D Shape Bingo!