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: […]
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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 […]
English Z
Zero […]
English Y
y axis, y coordinateYear […]
English X
x axis, x coordinate […]
English W
WeekWeightWhole numberWidth […]
English V
VolumeΑξίαVertex, verticesVertex angle, vertex of an angleVerticalVertical angles, vertically opposite angles […]
English U
Unit priceUnitsUnits of areaUnits of distanceUnits of MeasurementsUnits of moneyUnits of speedUnits of timeUnits of weightUnits of volume […]
English T
ThousandthThousandTemperatureTenTenthTetragonTetrahedronThree, thirteen, thirtyTime, units of timeTonTotalTrapezium, trapezoidTriangleTriangular prism […]
English S
ΑφαίρεσηSupplementary anglesSurface area […]
