Angles

Measuring Angles with a Protractor

Using a Protractor to measure an angle



Types of Angles

DIAGRAMNAME OF ANGLESIZE OF ANGLE
Diagram of acute angleAcute angleLess than 90°
Diagram of right angleRight angleEqual to 90°
Diagram of obtuse angleObtuse angleBetween 90° and 180°
Diagram of straight angleStraight angleEqual to 180°
Diagram of reflex angleReflex angleBetween 180° and 360°

Compass Bearing

Diagram of compass bearings

Cardinal Points - Directions in words e.g. north, south, east, west, north-east, south-east

Compass Bearings - Directions in numbers of degrees that are measured clockwise from north as follows:

Question - Orienteering

Orienteering compass

Orienteering is a sport that uses navigational skills of reading maps and compasses while running through mountains and valleys. If I leave home and I travel the following legs of my journey, how far and at what bearing from home will I be? (In your sketch, use a scale of 1 cm for each 1 km.)

Answer
I'm home

Did You Know That...?

Mandala geometric design

Mandalas are complex geometric designs for quiet contemplation in the Buddhist and Hindu religions.