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Maths•JHS Mensuration & Geometry

Perimeter & area

Junior High 6 questions
AI-drafted from platform data — specialist review scheduledBy DigiTransact Mastermind editorial teamLast updated
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What perimeter & area means

You work out how much space a shape takes up and how far round it goes. This helps you solve measurement questions for rectangles, triangles and circles in everyday problems and school tests.

What you will practise

  • Find the perimeter of rectangles using all four sides
  • Calculate rectangle area from length and width
  • Use triangle base and height to get area
  • Choose the correct formula for each shape
  • Answer word problems with units in cm or cm²

Before you start

You should already know the difference between length, width, base and height. You also need to be able to multiply simple whole numbers and read centimetre units correctly.

Worked example

One question from this skill's own question bank, shown with its full working.

Question

A rectangle is 8 cm by 5 cm. Find its area.

  • 13 cm²
  • 26 cm²
  • 40 cm²
  • 45 cm²
Answer: 40 cm²

Working: Area of a rectangle = length × width = 8 × 5 = 40 cm².

Common mistakes to avoid

  • Using the area formula when the question asks for perimeter. Check whether you need the distance round the shape or the space inside.
  • Forgetting to double the length and width of a rectangle. Add both pairs of equal sides before giving the final answer.
  • Leaving out the half in triangle area questions. Multiply base by height first, then divide by 2.
  • Writing cm for area answers instead of cm². Area always uses square units.

Curriculum and exam alignment

Ghana GES Basic 7 to 9 syllabusBECE

This topic usually appears in JHS measurement and geometry work, where you meet shapes and their properties. It supports common BECE-style questions on perimeter and area, so careful formula use is important.

Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.

Related skills

Other JHS Mensuration & Geometry skills in Maths, at the same point in the course.

Other Maths topics

Counting with PicturesPicture Addition & SubtractionEarly NumeracyNumber BasicsSHS Core MathematicsUniversity Mathematics

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Exams that assess perimeter & area

Junior High work on this skill feeds directly into these exam papers. Each page lists the Maths topics that appear on it.

BECEBECE practice questionsFree BECE practice across the subjects at this stage, with worked answers.GESGES practice questionsFree GES practice across the subjects at this stage, with worked answers.WASSCEWASSCE practice questionsListed as a related subject on the WASSCE practice page.

How this page was produced

This text was drafted with AI assistance from the questions and topics already stored on the platform. A subject-specialist review is scheduled but has not yet been recorded, so we do not claim it here.

Written by
DigiTransact Mastermind editorial team
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Practise perimeter & area

6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.

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