Across
- 4. The region of a circle bounded by an arc and the two radii containing its endpoints
- 6. The constant Greek symbol used to denote the ratio of a circle’s circumference to its diameter
- 10. The portion of a circular region bounded by an arc and the chord joining its endpoints
- 11. The scholar of Sangamagrama who discovered the first exact infinite series formula for π
- 13. The mathematician who "trapped" the value of π between 96-sided inscribed and circumscribed polygons
- 16. The mathematician of Alexandria who developed a formula for triangle area using only the lengths of its three sides
- 17. A property of a 4-gon whose vertices all lie on a circle, making it compatible with Brahmagupta’s area formula
- 18. An important part of mathematics where a broad result (like Brahmagupta's formula) includes a "special case" (like Heron's formula)
- 19. A category of numbers, including π, that cannot be written as a ratio of two integers
- 20. A line segment joining a triangle's vertex to the midpoint of the opposite side, dividing it into two equal areas
Down
- 1. The geometric term for the angle formed at the center of a circle by an arc
- 2. The ancient civilization (c. 1900 BCE) that calculated a π value of 3.125 by comparing a circle to a hexagon
- 3. A connected portion of a circle's edge defined by two endpoints
- 5. The specific name used for the perimeter of a circle
- 7. The distance between the starting points of adjacent lanes on an athletics track to ensure everyone runs the same distance
- 8. The Sanskrit term meaning "approaching" used by Āryabhaṭa to indicate that his value for π was an approximation
- 9. The area of mathematics birthed by Mādhava’s shift from geometric cutting to the analytical summing of numbers
- 12. The ancient mathematician whose Śhulbasūtra described a geometric method to "square a rectangle"
- 14. The total length around the border of any given shape
- 15. Denoted as 's', this is the value representing half of a triangle's or quadrilateral's total perimeter