Pi (Greek letter “π”) Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant which is approximately 3.14159. It is the ratio of a circle’s circumference to its diameter. […]
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Units of distance
Units of distance Distance measures length. For example, the distance of a road is how long the road is. In the metric system of measurement, the most common units of distance are millimeters, centimeters, meters, and kilometers. The parsec is the biggest unit of distance that is used to measure the distance between the astronomical objects that […]
Units of area
Units of area The units of area could be small or large units depending on the object that we measure. The common metric measurements for area are square centimeter, square meter and hectare (1 hectare =10,000 square meters). Areas of glass panes are measured in square centimeters. Building and floor areas are measured in square meters. […]
Percent, percentage
Percent, percentage Percent means “for every 100 parts“. The word comes from the latin phrase per centum which means per one hundred. Percentage means a part per hundred. It can be expressed in decimal form and in fraction form too. A percentage of a number is symbolized by writing: the number and the word “percent” after it the […]
Pair
Pair A set of two numbers or objects linked in some way, is called a pair. Examples: a pair of numbers ( 4, 9 ) a pair of pelicans a pair of socks […]
Parallel lines
Parallel lines Parallel lines are two or more straight lines that are at equal distance from each other and never meet, even if they are extended infinitely in both directions. Example: Try to find parallel lines in the picture: Image by studio4rt on Freepik […]
Odd number
Odd number Odd number is a number which is not divisible by “2”. An odd number always ends in 1, 3, 5, 7, or 9. Odd numbers from 1 to 100 When you have an odd number of objects, you can not divide them into equal groups! […]
Πυραμίδα
Πυραμίδα Η πυραμίδα είναι ένα τρισδιάστατο (3D) σχήμα με πολλαπλές επίπεδες επιφάνειες που αποτελείται από: Βάση: Ένα απλό πολύγωνο βρίσκεται στη βάση της πυραμίδας. Μπορεί να είναι ένα τρίγωνο, τετράγωνο, πεντάγωνο είτε ένα οποιοδήποτε πολύγωνο με ίσιες πλευρές. Ανάλογα με τη βάση, μπορούν να είναι κανονικές πυραμίδες ( όταν οι πλευρές της βάσης του πολυγώνου […]
Clockwise
Clockwise When something is moving clockwise, it is moving in a circle in the same direction as the hands on a clock. The clockwise direction The counterclockwise or anticlockwise direction https://en.wikipedia.org/wiki/Clockwise […]
Area
Area is the size of a surface. […]
