Zero Zero or 0 is a number with the value null in mathematics. It’s a number that is neither positive nor negative. In simple words, it means empty or nothing. 5 + 0 = 5 0 – 7 = -7 6 * 0 = 0 0/5 = 0, but 5/0 is undefined A number line from −3 to 3, with […]

# Tag: Estonian N

## Week

1 Week = 7 Days Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday and Monday together make one week. 1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds. A fortnight is a unit of time equal to 14 days (two weeks). […]

## Obtuse angle

Obtuse angle An obtuse angle is an angle that measures more than 90 degrees (90°) but less than 180 degrees (180°). An obtuse angle looks like this You can draw angles here with Geogebra https://www.geogebra.org/m/scavsujt […]

## 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: […]

## Obtuse angle

## Tetragon

Tetragon Tetragon is a plane figure with four straight sides and angles. In geometry a quadrilateral is a four-sided polygon, having four edges (sides) and four corners (vertices). It is also called a tetragon, derived from Greek “tetra” meaning “four” and “gon” meaning “corner” or “angle” The only regular (all sides equal and all angles equal) quadrilateral […]

## Arms of an angle

Arms of an angle Arms of an angle are the two lines that form the angle. The rays and lines used in forming an angle are arms of an angle. The rays (the arms) have a common joining point that is called the vertex of an angle. As the arms turn the angle changes. […]

## Angle

Angle An angle is a figure formed by two rays or lines sharing a common endpoint. An acute angle is an angle that measures less than 90° An right angle is an angle that measure is 90° An obtuse angle is an angle that measures between 90° and 180° An straight angle is an angle that measure is […]

## Addition to zero

Addition to zero Any number added to zero is equal to itself. Examples: 4+0=4 0+89=89 […]