# Maths - Angle Facts

> Source: https://ollybritton.com/notes/a-level/maths/topics/angle-identities/ · Updated: 2024-08-25 · Tags: maths

##### Visualise corresponding angles??
![PHOTO](corresponding-angles.png)

##### ![PHOTO CORR](corresponding-angles.png) Angles in this layout are called what??
Corresponding angles.

##### What is special about corresponding angles??
They are equal.

##### Visualise alternating angles??
![PHOTO](alternating-angles.png)

##### What shape do alternating angles make??
Z

##### ![PHOTO ALT](alternating-angles.png) Angles in this layout are called what??
Alternating angles.

##### What is special about alternating angles??
They are equal.

##### Visualise vertically opposite angles??
![PHOTO](alternating-angles.png)

##### ![PHOTO VERT](alternating-angles.png) Angles in this layout are called what??
Alternating angles.

##### Angles that add up to $90^{\circ}$ are called what??
Complementary angles.

##### Angles that add up to $180^{\circ}$ are called what??
Supplementary angles.

##### Visualise co-interior angles??
![PHOTO](co-interior-angles.png)

##### ![PHOTO COINT](co-interior-angles.png) Angles in this layout are called what??
Co-interior angles.

##### What is special about co-interior angles??
They add up to $180^{\circ}$.

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