mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Equal side and angle

In the diagram shown, the lengths AD=CD and the angles ABD=CBD.
Prove that the lengths AB=BC.

Show answer

If you enjoyed this puzzle, check out Sunday Afternoon Maths XXXVIII,
puzzles about 2d shapes, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025