# Unit Conversion [Math for ATPL]

For Computer-Based Interview [Length] 10 mm = 1 cm 100 cm = 1 m 1000 m = 1 km 1NM 浬 = 1.852 km 公里 = 1.15 miles 英哩 = 6076 ft 英呎 1 inch 英吋 = 2.54 cm 公分 144 sq. inch = 1 sq. feet   [Volume] 1 L =  1 dm3 = […]

# Unit Conversion [Math]

Only enough for Computer-Based Interview [Length] 10 mm = 1 cm 100 cm = 1 m 1000 m = 1 km 1NM 浬 = 1.852 km 公里 = 1.15 miles 英哩 = 6076 ft 英呎 1 inch 英吋 = 2.54 cm 公分   [Volume] 1 L =  1 dm3 = 1000 cm3 = 1000 mL […]

# Fuel Conversion – quantity and mass

[Ref Youtube] Important! US short ton, UK long ton and  Metric SI tonne 1 US ton (= 1 short ton) = 2000 lbs (907 kg) 1 UK ton (= 1 long ton) = 2240 lbs (1016 kg) 1 Metric (SI) ton (= 1 tonne), used in other area – 2204 lbs (1000 kg) Notes: 1 KG = […]

# Fractions – Math

[Ref http://www.math.com/tables/general/numnotation.htm] Fractions Digits to the right of the decimal point represent the fractional part of the decimal number. Each place value has a value that is one tenth the value to the immediate left of it. Examples: 0.123 = 123/1000 (said – point 1 2 3, or 123 thousandths, or two hundred thirty four thousandths) […]

# Math – formula

[Ref http://www.math.com/tables/geometry/areas.htm] Area [面積] square = a 2 rectangle = ab parallelogram 平行四邊形 = bh trapezoid 梯形 = h(b1 + b2)/2 circle = pi r 2 ellipse = pi r1 r2 triangle = bh/2 equilateral triangle = [(√3)/4]( a 2 )   Perimeter [圓周] square = 4a rectangle = 2(a+b) triangle = a + b + c circle = 2pi r    Volume [體積] cube = a 3 rectangular prism = = a b c cylinder =  pi r 2 h pyramid = (1/3) b h cone = […]

# Scale

[Ref FAA-H-8083-18 Flight Navigator Handbook] The ratio between any given unit of length on a chart and the true distance it represents on the earth is the scale of the chart. Charts are made to various scales for different purposes. If a chart is to show the whole world and yet not be too large, […]

# Division

[Ref. WIKI – https://en.wikipedia.org/wiki/Division_(mathematics)] dividend over the divisor “a divided by b”, “a by b” or “a over b”. dividend is divided by the divisor to get a quotient. Example: 20 ÷ 5 = 4 20 is the dividend, 5 is the divisor, 4 is the quotient. In some cases, the divisor may not be contained fully […]