The area and perimeter of a sector

A FULL LESSON on calculating the area and perimeter of a sector.

Assumed prior knowledge:

• Rounding with significant figures and decimals.
• Simplifying expressions.
• Fractions of amounts.
• Working with ratios (one question)
• Angles in quadrilateral (one question)

We are learning about: The area and perimeter of a sector.
We are learning to: Calculate the area and perimeter of a sector.

Differentiated objectives:

• Developing learners will be able to calculate the area of a sector of a circle.
• Secure learners will be able to calculate the perimeter of a sector.
• Excelling learners will be able to solve unfamiliar problems using their knowledge calculating the area and perimeter of a sector.

Starter: What fraction of the circle is shaded?
Main:

• Examples to find the area and perimeter of a sector.
• Standard questions with diagrams progressing to worded and problem solving questions.
  Plenary: Spot the mistake.

Extra:

• Booklet with all questions (including example) provided as worksheet to stick in books.

Any feedback is appreciated!