Angles at a Point

Angles formed around a point add up to 360°.

In the pic below, a + b + c = 360

Complementary Angles

Angles adding up to 90° are called complementary angles.

Why do obtuse angles never do well in their maths tests?

Because they are never right.

The Golden Ratio

Also referred to as The Divine Proportion or The most beautiful number in the Universe.

Often approximated to 1.618, this ratio can be found in many places (DNA, solar system, plants, etc...).

Many artists, creators and architects proportion their works to match the golden ratio due to the widely accepted belief it is aesthetically pleasing.

Perfect Numbers

A perfect number is a positive whole number that is equal to the sum of its factors (excluding the number itself).

For example, 6 (which has factors 1, 2, 3 and 6) is perfect because 6 = 1 + 2 + 3

Can you find the next perfect number?

I just had an argument with a 90° angle.

Turns out it was right.

Supplementary Angles

Angles adding up to 180° are called supplementary angles.

Angle

The word angle derives from the Latin word angulus which means corner.

Inflation

Often given as a percentage, this figure represents the average increase in the prices of goods and services within a country.

In the UK, the term RPI (Retail Price Index) is commonly used to represent this figure.

Inflation is often the result of an increase in production costs (raw materials, salaries, etc...) or due to a sudden increase in demand for a specific product/service.