This study notes covers Worked Example 1: Rectangle within Area of Rectangles & Triangles for GCSE Mathematics. 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 still be part of a steady revision cycle. It is section 4 of 8 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Worked Example 1: Rectangle
Find the area of a rectangle with length 8 cm and width 5 cm.
Step 1 Write the formula
Area = length × width
Step 2 Substitute and calculate
Area = 8 × 5 = 40 cm²
Practice questions for Area of Rectangles & Triangles
Which formula gives the area of a rectangle with length l and width w?
Explain why the area formula for a triangle uses the perpendicular height rather than the slant height.