Formulas of mostly all formulas on the ACT Math Section.
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| 678543257 | Perimeter | add up all sides | |
| 678543258 | Circumference | pi(D) or 2(pi)r | |
| 678543259 | Area of triangle | 1/2BH | |
| 678543260 | Area of rectangle or Square | L(W) | |
| 678543261 | Area of Parallelogram | B(H) | |
| 678543262 | Area of Trapezoid | A=½(b₁+b₂)h | |
| 678543263 | Area of Circle | Pir² | |
| 678543264 | Area of Polygon | A= 1/2ap (apothem, perimeter) | |
| 678543265 | Pythagorean Theorem | a²+b²=c² | |
| 678543266 | Sum of interior angles of a polygon | (n-2)180 ; with n as the number of sides in the figure | |
| 678543267 | Middle of Trapezoid | 1/2(AB+CD)=MN of trapezoid ABCDMN as MN as the middle horizontally | |
| 678543268 | exterior angle | is equal to the twom most interior angles | |
| 678543269 | SOH | CSC | |
| 678543270 | CAH | SEC | |
| 678543271 | TOA | COT | |
| 678543272 | Study 45 45 90 triangles | look at paper | |
| 678543273 | study 30 60 90 triangles | look at paper | |
| 678543274 | Square root of n times the square root on n=? | square root of N squared or N | |
| 678543275 | X times and fraction as the exponent | the top equals power and bottom equals root | |
| 678543276 | Quadratic Formula | x = (-b plus or minus) the square root of b^2 -4ac) / 2a from y = ax^2 + bx + c | |
| 678543277 | Distance Formula | d = Square root of [( x₂ - x₁)² + (y₂ - y₁)²] | |
| 678543278 | Lateral Area of Prism | perimeter of base x height | |
| 678543279 | Lateral Area of Cylinder | 2(pi)rh | |
| 678543280 | Lateral Area of Pyramid | 1/2 perimeter of base X slant height | |
| 678543281 | Lateral Area of Cone | (pi)r(slant height) | |
| 678543282 | Surface Area of Prism | Lateral Area + 2(Area of base) | |
| 678543283 | Surface Area of Cylinder | 2πrh+2πr² | |
| 678543284 | Surface Area of Pyramid | SA=area of base + lateral area | |
| 678543285 | Surface Area of Cone | πr²+πrl | |
| 678543286 | Surface Area of Sphere | SA=4(Pi)r(squared) | |
| 678543287 | Volume of Prism | area of base X height | |
| 678543288 | Volume of Cylinder | V=πr²h | |
| 678543289 | Volume of Pyramid | 1/3 area of base x height | |
| 678543290 | Volume of Cone | V=1/3πr²h | |
| 678543291 | Volume of Sphere | 4/3PIr³ | |
| 678543292 | Temperature Formulas | F to C is C=5/9(F-32) C to F is F=9/5(C)+32 | |
| 678543293 | Midpoint Formula | (x1+x2)/2, (y1+y2)/2 | |
| 678543294 | Slope Formula | y2-y1/x2-x1 | |
| 678543295 | Law of Sines | sinA/a=sinB/b=sinC/c | |
| 678543296 | Law of Cosines | c^2 = a^2 + b^2 - 2abcosC; b^2 = a^2 + c^2 - 2accosB; a^2 = b^2 + c^2 - 2bccosA; used with SAS or SSS | |
| 678543297 | Standard Formula of a Circle | (x-h)² + (y-k)²= r² | |
| 678543298 | Elipse Formula | (x-h)²/r^2 + (y-k)²/r^2=1 | |
| 678543299 | (h,k)=radius as does r | ... |
