mscroggs.co.uk
mscroggs.co.uk
Click here to win prizes by solving the mscroggs.co.uk puzzle Advent calendar.
Click here to win prizes by solving the mscroggs.co.uk puzzle Advent calendar.

subscribe

Puzzles

Two semicircles

The diagram shows two semicircles.
\(CD\) is a chord of the larger circle and is parallel to \(AB\). The length of \(CD\) is 8m. What is the area of the shaded region (in terms of \(\pi\))?

Show answer & extension

If you enjoyed this puzzle, check out Sunday Afternoon Maths LI,
puzzles about circles, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

angles binary polygons rugby scales christmas matrices doubling wordplay shape probabilty tiling cube numbers averages determinants sums grids square roots digits menace cubics partitions logic chocolate ellipses people maths ave consecutive numbers even numbers elections polynomials star numbers dates sets digital clocks circles perfect numbers means multiplication sport quadrilaterals arrows geometric mean percentages prime numbers digital products graphs functions division geometric means gerrymandering 3d shapes coordinates colouring perimeter geometry squares surds number chess shapes addition multiples consecutive integers lines calculus crossnumber algebra advent products range cryptic clues decahedra books speed folding tube maps pentagons bases rectangles volume albgebra square numbers taxicab geometry factors floors planes regular shapes integration chalkdust crossnumber expansions money numbers coins sequences area palindromes the only crossnumber dodecagons cards triangles clocks combinatorics quadratics irreducible numbers dominos dice pascal's triangle 2d shapes time median axes integers symmetry complex numbers triangle numbers crossnumbers factorials unit fractions sum to infinity parabolas tournaments probability remainders games routes odd numbers trigonometry proportion cryptic crossnumbers balancing tangents indices mean hexagons differentiation crosswords spheres fractions

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024