# Mathspp Blog

#### geometry — The mathematical branch that deals with shapes and their properties

##### Animating a rotating spiral

With a couple of loops and a bit of maths you can create a rotating spiral.

##### (More) Animations from first principles

Create a zooming animation from first principles in Python. In 5 minutes. Kind of.

##### Animations from first principles

Create animations from first principles and morph between different figures with Python. In 5 minutes. Kind of.

##### TIL #051 – Heron's formula

Today I (re)learned Heron's formula to compute the area of a triangle from its three sides.

##### Problem #057 – how to find the circle centre

Can you find the centre of the circle with just five lines?

##### Problem #049 – coin pyramid

Can you make the pyramid point the other way by moving only three coins?

##### Problem #046 – triangle grid

Can you draw 4 triangles in this 5 by 5 grid, covering all dots?

##### Problem #037 - game of coins

Alice and Bob sit across each other, ready for their game of coins. Who will emerge victorious?

##### Problem #036 - huge, tiny triangle

Can you find a really large triangle that is also really tiny?

##### Problem #030 - efficiency at the beach

You are sunbathing when you decide to go and talk to some friends under a nearby sun umbrella, but first you want to get your feet wet in the water. What is the most efficient way to do this?

##### Problem #026 - counting squares

I bet you have seen one of those Facebook publications where you have a grid and you have to count the number of squares the grid contains, and then you jump to the comment section and virtually no one agrees on what the correct answer should be... Let's settle this once and for all!

##### Problem #019 - fold the alphabet

Take out a piece of paper and a pencil, I am going to ask you to write some letters in your sheet of paper and then I am going to challenge you to fold the sheet of paper... with a twist!

##### Problem #008 – cutting squares

Given some paper squares, can you slice them and then glue them back together to form a single square?

##### Problem #001 - a dancing triangle

This post's format will be a bit different from the usual and the first of a series of posts of this type. In this post, I will state a problem and then present my solution.