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Important ACT formulas to know?

Hey everyone! I'm prepping for the ACT and I want to make sure I've got all the important math formulas memorized. Can you share any must-know ACT formulas or any resources where I can find them? I appreciate the help!

7 months ago

Hey there! Proper preparation is crucial for the ACT, and having crucial math formulas memorized can certainly give you a leg up. Here's a list of important ACT math formulas that I'd recommend that you focus on:

1. Area of Triangle = (base height) / 2

2. Area of Circle = π radius^2

3. Circumference of Circle = 2 π radius

4. Area of Rectangle = length width

5. Area of Trapzoid = (base1 + base2) height / 2

6. Pythagorean Theorem: a^2 + b^2 = c^2 (for right triangles)

7. Quadratic Formula: x = (-b ± √(b^2 - 4ac)) / 2a

8. Slope-Intercept Form: y = mx + b (where m is the slope and b is the y-intercept)

9. Distance Formula: d = √((x2 - x1)^2 + (y2 - y1)^2)

10. Midpoint Formula: M = ((x1 + x2) / 2 , (y1 + y2) / 2)

11. Sum of Interior Angles of a Polygon: (n - 2) 180° (where n is the number of sides)

12. Volume of Cylinder = π radius^2 height

13. Volume of Cone = (1/3) π radius^2 height

14. Volume of Rectangular Prism = length width height

15. Arithmetic Sequences: an = a1 + (n - 1)d

16. Geometric Sequences: an = a1 r^(n-1)

These are some of the most frequently encountered formulas on the ACT. However, don't forget that understanding concepts and knowing when to apply these formulas is equally important for the test.

For resources, I would recommend browsing websites like ACT.org, Khan Academy, or CollegeVine for additional ACT preparation materials. They offer free practice questions, tips, and strategies that can be immensely helpful.

Good luck with your ACT preparation!

7 months ago

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