# Top 10 emoji for use in mathematics

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

## 9.

🏹

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

# Top ten vote issue 05

What is the best geometry instrument?

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# Top ten vote issue 04

What is the best part of a circle?

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# Top Ten vote: Colours of chalk

What is the best colour of chalk?

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# Top Ten: Mathematical symbols

This issue, Top Ten features the top ten mathematical symbols for use in algebra!

A new entry at 10, everyone’s least favourite axis… y!

At 9, allegedly resembling the British Rail logo… the not equals symbol!

# Top Ten: Mathematicians’ haircuts

This issue, Top Ten features the best haircuts held by mathematicians!

10. Rumour has it that judges’ wigs were inspired by Leonhard Euler’s hair.

9. Peter Dirichlet loves answering your letters and caring for his hair.