Treasure Inspiration
Circles
T

Parts of a Circle and Basic Formulas

Build the core idea from scratch with gentle steps and lots of hints.

Mathematics · Beginner

5

questions · ~4 min · 3 hints each (−5 pts)

Confidence tracking, 3-tier hints and instant feedback.

What you'll learn

Each question helps you build key knowledge and skills.

  • 1The radius is the distance from the centre to the edge; the diameter is twice the radius and passes through the centre.
  • 2Circumference is the distance around a circle: C = πd or C = 2πr.
  • 3Area of a circle: A = πr².
  • 4Use π = 3.14 unless told to leave answers in terms of π.

Question mix

A mix of question types to build your skills.

  • Fill the gap×5

Different question types help you think in different ways.

How it works

A simple 3-step process

  1. 1

    Rate your confidence

    Tell us how sure you feel before answering. It helps us understand your starting point.

  2. 2

    Use hints if stuck

    Get up to 3 helpful hints per question. Each hint costs 5 Treasure Points.

  3. 3

    See what went wrong

    Get instant feedback with clear explanations, so you can learn and improve.

Ready when you are

This takes about 4 minutes.