Skills to help you score well on the ACT Math section.

### When you see variables or unknowns in the question and numbers in the answers:

Use the Answers. Convert fractions, pi, or √ to decimals.

### "What is m in terms of p and q" is just a fancy way of saying:

solve for m or use algebra to get m alone

### When you see two parallel lines that are crossed by another line, eight angles are formed and:

all of the bigger-looking angles are equal, and all of the smaller-looking angles are equal

### When you see a triangle with two equal sides:

mark the two opposite angles as equal. (3 equal sides means 3 equal 60 degree angles)

### The key to charts and graphs is:

to read the intro material and the "note" if there is one, and to expect an average, percent, and/or probability question about the data

### sohcahtoa:

some other horse caught another horse taking oats away; sin=opp/hyp, cos=adj/hyp, tan=opp/adj

### If one side of a triangle is the diameter of a circle, and the opposite vertex is on the circle, then:

the triangle is right with its right angle opposite the diameter

### An arithmetic sequence is a sequence of numbers where a certain number is:

ADDED to each term to arrive at the next

### A geometric sequence is a sequence of numbers where a certain number is:

MULTIPLIED by each term to arrive at the next

### The key to complex number questions is to treat i like a normal variable, and then:

in the final step, replace i^2 with -1

### Know how to find unknown quantities (areas, lengths, arc and angle measurements) from:

known quantities (the whole equals the sum of its parts)

### Watch out for questions that:

seem very easy but that can be tricky (beware of choice A as a "lure" choice)