Baudhayana is regarded as the father of Indian geometry for his contributions to the Sulba Sutras, which contain geometric constructions and formulas.

Baudhayana discovered the Pythagorean theorem centuries before Pythagoras, as evidenced in the Sulba Sutras.

Bhaskara I provided a proof for the Pythagorean theorem in his commentary on the Aryabhatiya.

Brahmagupta's work on cyclic quadrilaterals laid the foundation for further studies in geometry.

Brahmagupta's work on triangles and quadrilaterals includes formulas for calculating their areas and properties.

Brahmagupta's formula provides a method for calculating the area of a cyclic quadrilateral.

Aryabhata's work on regular polygons includes methods for constructing them using geometric constructions.

Aryabhata introduced the concept of the sine function and developed trigonometric tables.

Bhaskara I introduced the concept of the cosine function and developed trigonometric identities.

Bhaskara I introduced the concept of the tangent function and developed trigonometric identities involving tangents.

Bhaskara I introduced the concept of the cotangent function and developed trigonometric identities involving cotangents.

Bhaskara I introduced the concept of the secant function and developed trigonometric identities involving secants.

Bhaskara I introduced the concept of the cosecant function and developed trigonometric identities involving cosecants.

Bhaskara I introduced the concept of the versine function and developed trigonometric identities involving versines.

Bhaskara I introduced the concept of the haversine function and developed trigonometric identities involving haversines.