DAY-9
MUST KNOW FORMULAS
@EDMATHLAB

DAY-4
EQUATIONS THAT CHANGED THE WORLD
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Vertically opposite angles, formed when two lines intersect, are always congruent, meaning they have identical measurements and are equal. Located across from each other at a shared vertex, these non-adjacent pairs (e.g., in an 'X' shape) are always equal in measure. This property holds true because they are supplementary to the same adjacent angle.

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Pi is an irrational number, not a rational number. It cannot be expressed as a simple fraction p/q of two integers, and its decimal representation is infinite and non-repeating 3.14159... Common approximations like 22/7 or 3.14 are rational, but they are not equal to the exact value of pi

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Yes, any terminating or recurring decimal is a rational number because it can be expressed as a fraction p/q of two integers q≠0 Terminating decimals have a finite number of digits, while recurring (repeating) decimals have a pattern that repeats forever, both of which are convertible into rational form.

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Eeii senior 🥹👌

A determinant is defined only for a square matrix (an n × n matrix with an equal number of rows and columns). It is a scalar value that provides key information, such as whether a matrix is invertible (non-zero determinant) or singular (zero determinant).

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A square pyramid actually has five vertices, not four. It consists of four vertices at the corners of its square base and one apex vertex at the top where the four triangular faces meet. It is a 3D polyhedron with 5 faces, 5 vertices, and 8 edges.

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