基本图形的面积公式（Area formula of basic graphics）.docVIP

基本图形的面积公式（Area formula of basic graphics） In mathematics is interesting; 3^3 said three times 3, 3^2 said two times 3 The number of copies per 1 x = total The total number of copies per =. The total number of copies of each number =. 21 x = several multiples of multiples of multiples A few times, 1 times times = A few times, ratio = 1 times 3 speed time distance = x Distance / speed = time Time = distance / speed 4 price = price * number Price / price = number The total number of 83019 = price 5 efficiency * working time = total amount The total amount of work, work efficiency = working time The total amount of work, work time = work efficiency 6 addend addend = + and And a = other addend addend 7 - meiosis difference = minuend Minuend - difference = meiosis Poor + = subtrahend minuend The 8 factor X factor = product Product, a factor = another factor 9 dividend, divisor = Business Dividend, divisor = Business Taking x = dividend divisor The calculation formula of primary school mathematics figure 1 square C S a the length of perimeter area Perimeter length = x 4 C=4a Area = length * length S=a * a 2. The volume of V: a: edge length Surface area = edge length x edge length x 6 S =a * a * 6 Volume = length * length * edge length V=a * a * a 3 rectangular C S a the length of perimeter area The perimeter (length + width) x = 2 C=2 (a+b) Area = length * width S=ab 4 cuboid The volume of V: s: length b: width h: high a: area (1) surface area (L * W + + high length * width * height) * 2 S=2 (ab+ah+bh) (2) volume = length * width * height V=abh 5 triangle S a h high floor area Bottom area = x height / 2 S=ah / 2 Triangle area high = x 2 / bottom Triangle area = x 2 / high 6 parallelogram S a h high floor area Bottom area = x S=ah 7 ladder S a on the bottom area of the bottom of the B H Area = (+ down on the bottom end) * / 2 S= (a+b) * H / 2 Round 8 S C - d= r= diameter, perimeter area radius (1) = =2 * * * perimeter diameter pi * radius C= II d=2 II R (2) * * * area = rad