Trigonometry is a popular branch of mathematics. It indulges the study of angles and the length of a triangle. A **trigonometry table** is widely used in solving geometric calculations. The values of trigonometric standard angles like 0°, 30°,45°, 60°, and 90° can be obtained with the help of trigonometry tables.

Some trigonometric ratios are: sine, cosine, tangent, cosecant, secant and cotangent. In solving trigonometric problems, the values of trigonometric ratios of standard angles play an important role. Learning trigonometry tables makes the concept easy to understand and practice. Learning formulas of trigonometry can make the process of solving trigonometric problems easier.

It is the area enclosed by the sides of the quadrilateral. A polygon consisting of four sides can be called a ‘Quadrilateral’. Some examples of a quadrilateral are trapezium, parallelogram, rhombus, kite, rectangle, square, and so on. The **area of quadrilateral** is the total space occupied inside the quadrilateral. A quadrilateral can be obtained by joining only four points, consisting of three points as collinear points. This two- dimensional figure comprises four vertices, four angles, and four sides and the sides of a quadrilateral are not always equal. The area of a quadrilateral differs as per the different shapes.

- The adjacent angles in two pairs of a quadrilateral can make 180 degrees.
- All quadrilateral figures have four angles, four vertices, and four sides.
- The total sum of the quadrilateral’s interior angles is 360 degrees.
- The quadrilateral consists of two diagonals.

- Parallelogram: This kind of quadrilateral comprises two pairs of parallel sides and the opposite sides are always parallel and equal in length but the opposite angles are equal in measure.
- Rhombus: It is a parallelogram that contains four equal sides. A rhombus resembles a square. The diagonals in the rhombus meet in the middle at 90 degrees and bisect each other. The total sum of only two adjacent angles is 180°. One great example of a rhombus is a diamond shape.
- Trapezium: A quadrilateral in which a pair of opposite sides are parallel is called a trapezium. The legs of the trapezium refer to the sides which are not parallel to each other. And bases of the trapezium are the sides that are parallel to each other.
- Rectangle: A rectangle where the opposite sides are equal and parallel and the number of interior angles is equal to a right angle. In a rectangle, the diagonals bisect each other. Not all parallelograms are rectangles but all rectangles are parallelograms.
- Kite: A kite is made up of two pairs of adjacent sides and a pair of equal opposite angles. And perpendicularly, the diagonals of the kite intersect

- Focus on learning the formulas of sine, cosine, and tangent. Other ratios are just the opposite of the first three.
- Make tables and practice without checking the solutions.
- Practice more by solving sums related to the concept of trigonometry tables.

- The quadrilaterals are used in architecture which helps in creating beautiful shapes and designs. The parts of the houses are constructed by using quadrilateral figures in the form of walls, doors, rooms, and so on.
- The pools are shaped using quadrilaterals.
- The Rubik’s cube which is mostly square strengthens intellect skills.
- We can find rhombus in fashionable earrings and pendants, such shapes make them look attractive and impressive.

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