Maths loves symbols. Everyone loves emoji. It’s 2017 and time we brought the two together. To get you started, here are our **top ten emoji for use in mathematics**!

## 10.

📐

Don’t leave home without one: it’s the nifty **45° set square**. What better reminder is there that

$$\sin\left(\frac{\pi}{4}\right) = \frac{\sqrt{2}}{2}, \qquad \cos\left(\frac{\pi}{4}\right) = \frac{\sqrt{2}}{2}, \qquad \tan\left(\frac{\pi}{4}\right) = 1$$ 📐

## 9.

🏹

Perfect for popping over a letter to make it a vector, it’s the **bow and arrow**:

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