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Brahmagupta is considered the father of Indian geometry for his contributions to the field, including his work on the Pythagorean theorem and his development of a formula for the area of a triangle.

The Pythagorean theorem is a fundamental theorem of geometry that states that the sum of the squares of the two shorter sides of a right triangle is equal to the square of the hypotenuse.

Brahmagupta's formula is a formula for the area of a triangle that is given by the formula: Area = √(s(s-a)(s-b)(s-c)), where s is the semiperimeter of the triangle and a, b, and c are the lengths of the three sides of the triangle.

Bhaskara II is credited with developing a method for solving quadratic equations, which he presented in his book, the Lilavati.

Brahmagupta is credited with developing a method for solving cubic equations, which he presented in his book, the Brahmasphutasiddhanta.

Bhaskara II is credited with developing a method for solving quartic equations, which he presented in his book, the Lilavati.

No Indian mathematician is known to have developed a method for solving quintic equations.

No Indian mathematician is known to have developed a method for solving sextic equations.

No Indian mathematician is known to have developed a method for solving septic equations.

No Indian mathematician is known to have developed a method for solving octic equations.

No Indian mathematician is known to have developed a method for solving nonic equations.

No Indian mathematician is known to have developed a method for solving decic equations.

No Indian mathematician is known to have developed a method for solving undecic equations.

No Indian mathematician is known to have developed a method for solving duodecic equations.

No Indian mathematician is known to have developed a method for solving tridecic equations.