Area of a trapezium

A complete lesson for introducing the trapezium area rule.

Activities included:

Starter:
Non-calculator BIDMAS questions relating to the calculations needed to area of a trapezium. A good chance to discuss misconceptions about multiplying by a half.

Main:

• Reminder of shape properties of a trapezium
• Example-question pairs, giving pupils a quick opportunity to try and receive feedback.
• A worksheet of straight forward questions with a progression in difficulty, although I have also built in a few things for more able students to think about. (eg what happens if all the measurement double?)
• A challenging extension task where pupils work in reverse, finding measurements given areas.

Plenary:
Nice visual proof of rule by relating to the rule for the area of a parallelogram.

Printable worksheets and answers included.

Please review it if you buy as any feedback is appreciated!