Solve Puzzle 1 to unlock this puzzle.
Estimated difficulty: Hard
In trapezoid ABCD, AB is parallel to CD. Diagonals AC and BD meet at O. Triangle COD has area 18 cm² and triangle AOB has area 32 cm². Find the total shaded area of triangles AOD and BOC.
Enter the correct answer to unlock Puzzle 10.
All puzzles
- Puzzle 1 · Medium (estimated)
- Puzzle 2 · Medium (estimated) · Locked
- Puzzle 3 · Hard (estimated) · Locked
- Puzzle 4 · Medium (estimated) · Locked
- Puzzle 5 · Hard (estimated) · Locked
- Puzzle 6 · Hard (estimated) · Locked
- Puzzle 7 · Hard (estimated) · Locked
- Puzzle 8 · Hard (estimated) · Locked
- Puzzle 9 · Hard (estimated) · Locked
- Puzzle 10 · Hard (estimated) · Locked
- Puzzle 11 · Hard (estimated) · Locked
- Puzzle 12 · Hard (estimated) · Locked
- Puzzle 13 · Hard (estimated) · Locked
- Puzzle 14 · Hard (estimated) · Locked