Roughly around.

# Angle ABC (notation)

Alternative Versions: ∠ABC or a ^ over the middle letter.

The angle made between sides AB and BC. The angle can always be found at the middle letter.

Example: The angle ABC is marked with an x.

🔑Key Angle Notation Topics: Circle Theorems, Geometric Proof, Vectors
👀Also Look up: AB Notation, A Notation, ABC Notation

# ABC (Notation)

The shape made by joining the vertices A, B and C. Capital letters are used for each of the vertices.

Note: The number of letters represents how many corners the shape has. ABCD would represent a four sided shape.

Example: Triangle ABC has three marked angles.

🔑Key Shape Notation Topics: Circle Theorems, Geometric Proof, Vectors
👀Also Look up: AB Notation, A Notation, ABC Angle Notation

# A (Notation)

A capital letter is used to name a particular point on a graph or diagram. Any letter can be used to represent a point, however some letters have particular meanings.

O = Origin (0,0)
M = Midpoint

Example: This triangle has three points: A, B and C.

🔑Key Topics: Circle Theorems, Geometric Proof, Vectors
👀Also Look up: Angle Notation, AB (Notation), ABC Notation

# Average Speed

The speed an object takes to travel a certain distance, including any stops or changes in speed.

Example: Calculate the average speed for the whole journey.

🔑Key Topics: Speed, Distance and Time
👀Also Look up: Steady Speed, Compound Measure

# Arc Length

The distance around a circle between two points.

Example:

🔑 Key Arc Length Topics: Arc Length
👀Also Look Up: Circle, RadiusSector, Arc

# Acute

An angle less than 90o.

🔑 Key Acute Topics: Drawing Angles, Measuring Angles, Angles on Parallel Lines
👀Also Look Up: Obtuse, Reflex, Angle