Exercises: Perimeter and Area of Plane Figures

Work through each section in order. Show your working, and always write the correct unit (cm or cm²) with your answer.

Grade 7·21 problems·~28 min·Uganda NCDC Primary 7 Mathematics·lesson·measurement-01

Work through problems with immediate feedback

Fluency Practice

A rectangle measures 5 cm by 4 cm. What is its area?

$20$ cm² -- multiply the length and the width, since area counts the unit squares that tile the rectangle

$18$ cm² -- add the length and width, then double the result

$9$ cm² -- add the length and the width directly

$20$ cm -- multiply the length and width, but report it as a length since that's the more familiar unit