Ángulo obtuso Un ángulo obtuso es un ángulo que mide más de 90 grados (90°) pero menos de 180 grados (180°). Un ángulo obtuso tiene el siguiente aspecto: Aquí puedes dibujar ángulos con Geogebra https://www.geogebra.org/m/scavsujt […]
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Plus
Plus A. The sign + for addition, is called plus. Example: two plus three is equal to five __________________________________________________________________________ B. The sign + (plus), is also the symbol for positive numbers. […]
Pie graph or chart
Pie graph or chart A pie chart is a type of graph that presents the relationship of different parts a data set. A pie chart is a circular graph, divided into slices (or sections), where each section represents a percentage of the data. Example: A pie chart to show children’s favourite sport. This pie chart represents 50 […]
Perimeter
Perimeter The perimeter of a 2D shape is the total length of all its sides. For example, a rectangle has four edges, so its perimeter is the total of those four edges added together. The perimeter of this rectangle is the sum of the length of all its sides: P = 6 + 6 + […]
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 […]
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! […]
Numerator
Numerator Numerator is the part of a fraction that is above the line and signifies the number of parts selected or removed from the total number to be divided by the denominator. […]
Obtuse triangle
Obtuse triangle An obtuse triangle or obtuse-angled triangle is a type of triangle that has one obtuse (greater than 90°) angle. As the sum of all the interior angles of a triangle is 180°, an obtuse-angled triangle has one obtuse angle and two acute angles (less than 90° each). An obtuse triangle is like this: […]
Negative integer
Negative integer A negative integer is the opposite of a natural number. It is not a fraction or a decimal. It is a number whose value is always less than zero and it has a minus (-) sign before it. For example, -3 and -5 are negative integers. On a number line, negative numbers are represented on the […]
