PrepWisePrepWiseMathematics
Geometry & MeasuresMedium Exam FrequencyAQAEdexcelOCRWJEC

Area of Rectangles & Triangles

Revise Area of Rectangles & Triangles in Geometry & Measures for GCSE Mathematics with 12 exam-style questions and 6 flashcards. This topic appears regularly enough that it should be part of a solid GCSE revision cycle.

Study this topic

1

What is Area?

Introduction2

The Key Formulas

Key Facts3

Why is Triangle Area = ½ × Rectangle?

Deep Dive4

Worked Example 1: Rectangle

Notes5

Worked Example 2: Triangle

Notes6

Worked Example 3: Finding a Missing Length

Notes7

Common Mistakes

Notes

Sample Flashcards

Triangle Area
Area = ½ × base × perpendicular height (A = ½bh)
Rectangle Area
Area = length × width (A = l × w)

Sample Questions

Which formula gives the area of a rectangle with length l and width w?

  • A. 2(l + w)
  • B. l + w
  • C. l × w
  • D. (1/2) × l × w
1 markfoundation

Explain why the area formula for a triangle uses the perpendicular height rather than the slant height.

2 markshigher

12

exam-style questions

6

revision flashcards

Ready to revise Area of Rectangles & Triangles?

Get personalised daily study plans, adaptive quizzes, and spaced repetition flashcards.

Join Alpha

Previous topic

Perimeter

Next topic

Area of Parallelograms & Trapeziums