Brahmagupta, a renowned Indian mathematician and astronomer, is credited with developing the concept of the cyclic quadrilateral, also known as Brahmagupta's quadrilateral, in the 7th century.

Brahmagupta's Theorem, also known as Brahmagupta's formula, establishes that in a cyclic quadrilateral, the sum of the squares of the diagonals is equal to the sum of the squares of its sides.

Aryabhata, a prominent Indian mathematician and astronomer, is recognized for his contributions to the construction of regular polygons, including methods for constructing regular pentagons, hexagons, and octagons.

Brahmagupta's Formula, also known as Brahmagupta's rule, provides the area of a regular polygon with n sides and side length s as (1/4) * n * s^2 * cot(180/n).

Baudhayana, an ancient Indian mathematician, is credited with developing the concept of Pythagorean triples, which are sets of three positive integers a, b, and c that satisfy the equation a^2 + b^2 = c^2.

Pythagoras' Theorem, also known as the Pythagorean equation, establishes that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Baudhayana, an ancient Indian mathematician, is renowned for his work on the construction of the Sulba Sutras, a collection of mathematical texts that provide instructions for constructing altars and other geometric figures.

The Triangle Sum Theorem, also known as the Angle Sum Theorem, states that the sum of the interior angles of a triangle is always 180 degrees.

Aryabhata, a prominent Indian mathematician and astronomer, is credited with developing the concept of the golden ratio, also known as the divine proportion, in the 5th century.

The Golden Ratio Theorem, also known as the Divine Proportion Theorem, establishes that the ratio of the golden ratio is approximately 1.618.

Bhaskara II, a renowned Indian mathematician and astronomer, is credited with developing the concept of the Fibonacci sequence in the 12th century.

The Fibonacci Sequence is a sequence in which each number is the sum of the two preceding ones, starting with 0 and 1.

Bhaskara II, a prominent Indian mathematician and astronomer, is credited with developing the concept of Pascal's triangle in the 12th century.

Pascal's Triangle is a triangular array of binomial coefficients that arises in combinatorics.

Bhaskara II, a renowned Indian mathematician and astronomer, is credited with developing the concept of the binomial theorem in the 12th century.