# Rosie Explores Tetris Puzzles

We’re celebrating **National LEGO Day** and **National Puzzle Week** by designing our very own LEGO Tetris puzzle!

You’ll need to think about **translations**, **rotations**, and **reflections** as you design your **tetrominoes** – the geometric shapes made out of four or more squares that serve as the playing pieces in Tetris.

**Translations**occur when you**slide an object in any directio**n without changing its size or shape.**Rotations****move an object around a fixed point**without changing its size or shape.**Reflections****flip****an object across a line**without changing its size or shape. A reflection is a**mirror image**of the object as it appeared in its original position.

**Want to build a Lego Tetris puzzle at home or in your classroom**? Watch the video for an overview, gather the materials listed at the right, and follow the instructions below!

## Watch The Video

https://youtu.be/UVP3FfFDU8s

## Step-By-Step Instructions

### Step 1

**Draw** a **box** that is 2.5 x 3.25 inches

### Step 2

**Design** a **minimum of four different tetrominoes** using LEGO squares and rectangles. Tetriminos are a geometric shape made up of four or more squares, and for our purposes, each “stud” or dot on a lego is equivalent to a square. **Each of your tetromino designs must have at least four dots!**

### Step 3

Using **reflections**, **translations**, and **rotations**, **fill** the 2.5 x 3.25 inch box completely with your tetrominoes. There should be **no negative space** and the pieces **should not go outside the box’s boundary**! Can’t get it to work the first time around? No problem – just go back and redesign some of your tetrominoes until you have the perfect fit for your puzzle!