Cheat Sheet

Cheat Sheet (Make sure to draw your rulers and protractors) (Also write down ABCD and ABCDE before hand to save time during the test) 3:4:5 6 : 8 : 10 9 : 12 : 15 5 : 12 : 13 8 : 15 : 17 45:45:90 Longest side: multiply by 2 Shortest side: divide by 2 30:60:90 Longest side is twice the shortest side Middle side is the shortest side times 3 Even  Even = Odd  Odd = Even  Odd = x + 2xy + y = (x + y) x – 2xy + y = (x – y) x –y        2 2 2 2 2 2 2 2 Even + Even = Odd + Odd = Even + Odd = = (x – y)(x + y) An integer is divisible by 2 if its units digit is divisible by 2 An integer is divisible by 3 if the sum of its digits is divisible by 3. An integer is divisible by 4 if its last two digits form a number divisible by 4. An integer is divisible by 5 if its units digit is either 0 or 5. An integer is divisible by 6 if it is divisible by both 2 and 3. An integer is divisible by 9 if the sum of its digits is divisible by 9. An integer is divisible by 10 if its units digit is 0. 2  1 .4 3  1 .7 I = prt D=rt 1 1 1   t1 t 2 t total p1q1  p2q2  ptotal q1  q2  V  L W  H d  ( x2  x1 ) 2  ( y 2  y1 ) 2 A=½bh 2 A= s 3 4 SA  2LW   2LH   2WH  V = hr² V= 4 r³ 3 w1t1 wt  2 2 other other A = r² C = 2r A = bh S = 180(n – 2) difference 100 original x Length  360 Circum Verbal 5th 22min left 5th 33min left 10th 18 10th 26 18 13 15th 8 15th 11 20th 4 20th 7 25th Math 23th