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Acute Angle

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An acute angle has a measure more than 0°  and less than 90°


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An acre is an Imperial measurement of area, usually used to measure land.

1 acre = 4,840 square yards

1 acre = 0.4 hectares approximately

Absolute Value

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Absolute value shows How far a number is from zero.

Example6” is 6 units away from zero, and “-6” is also 6 away from zero.

So, the absolute value of 6 is 6, and the absolute value of -6 is also 6.

The symbol “|” is placed either side to mean “Absolute Value“, so we can write: |-6| = 6



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Abscissa is the “x“ value in a pair of coordinates. It’s always written first in an ordered pair of coordinates such as (12,5).In the example above, the value “12” is the abscissa. (The second value “5“ is called the Ordinate)