In this activity, you will need to find missing angles.
Missing angles on a straight line:
Angles on a straight line add up to 180°.
To calculate a missing angle on a straight line, take away the known angle from 180°.
Missing angles in a full turn:
Angles in a full turn add up to 360°.
To calculate a missing angle in a full turn, take away the known angle from 360°.
Missing angles on intersecting lines:
All 4 angles will add up to 360°.
Opposite angles on a cross are equal.
Missing angles in quadrilaterals:
A quadrilateral is any shape with 4 sides.
For example: square, rhombus, trapezium, parallelogram.
The angles in a quadrilateral add up to to 360°.