Meet 1 Topics

If you want to lear more about one of these topics, do a goole search of the topic under kahn academy. For example, "kahn academy factors"

TOPICS FOR MEET 1 (No calculators allowed!)
common factors
primes
evaluating expressions (order of operations)
factorials
fractions and decimals
ratios
turning English sentences into expressions using variables
area and perimeter
coordinate plane
averages - mean, median, and mode
logic problems

Here's a cool formula (Heron's formula) for finding the area of a triangle when you know all three sides.
Say 3", 4", 5"
First calculate the semi-perimeter (half the perimeter)
s=(a+b+c)/2  s=(3+4+5)/2 = 12/2 = 6
Now multiply s(s-a)(s-b)(s-c) =  6(6-3)(6-4)(6-5) = 6 * 3 * 2 * 1 = 36
Now take the square root - what number times itself = 36? The answer is 6
The area of the triangle is 6 sq in. The nice thing is that this works for all triangles!