The area of a circle can also be calculated using the diameter when the radius is unknown with the following formula: A = (π/4) × d2. The Area of Circles with Diameter Values. Implementation: Find the perimeter of an equilateral triangle with a side of 9 units. Since an equilateral triangle has equal sides the sum is represented as 3a To calculate the perimeter of an equilateral triangle the sum of its three sides is calculated hence the formula is, P = 3a, Where, P = Perimeter, a = one side of the triangle. Perimeter and Area of Equilateral TrianglesĪ type of triangle whose all three sides are equal, as well as all the three angles, is equal to 60° each is known as an Equilateral Triangle. Implementation: Calculate the circumference of a circle with an 8 cm radius. To calculate the circumference of a circle the following formula is used:Ĭ = 2πr, Where, c = circumference, r = for radius and π = constant = 3.14 Implementation: Calculate the area of a circle with a radius of 15cm. To calculate the area of a circle the following formula is used:Ī = πr 2 Where, A = Area of the circle, π = constant = 3.14, r = radius Some of the examples of topics of geometry are explained below: This branch of mathematics lets us learn about different angles, transformations, and similarities in the figures. Geometry is the branch of mathematics that deals with shapes (Circle, triangle, rectangle, oval, square, etc.), angles, dimensions, and sizes of a variety of things that we experience in our daily life. The word Geometry is derived from the two ancient Greek words, “Geo” and “Metron” where Geo stands for Earth and Metron stands for measurements.
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