90 (number)

List of numbers — Integers << 90 91 92 93 94 95 96 97 98 99 >>
Cardinal	ninety
Ordinal	90th (ninetieth)
Factorization
Divisors	2, 3, 5, 6, 9, 15, 18, 30, 45
Roman numeral	XC
Binary	1011010
Hexadecimal	5A

In mathematics

In normal space, the interior angles of a square measure 90 degrees each. Also, in a right triangle, the angle opposing the hypotenuse measures 90 degrees, with the other two angles adding up to 90 for a total of 180 degrees.

In other fields

• The atomic number of thorium, an actinide.
• The designation of American Interstate 90, a freeway that runs from Washington to Massachusetts.
• The code for international direct dial phone calls to Turkey.
• The year AD 90, 90 BC, or 1990.

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