Areas & percentages

Question 1

What is the area of a triangle?

Answer 1

Area = 1/2 times b times h

b=base
h=vertical height

Question 2

What is the area of a rectangle?

Answer 2

Area= w times h

w= width 
h= height

Question 3

What is the area of a circle?

Answer 3

Area = Pi times r^2

r = radius

Question 4

What is the circumference of a circle?

Answer 4

2 times Pi times r

r= radius

Question 5

What is the formula for the area of a square?

Answer 5

Area= a^2 with a = length of a side

Question 6

How to figure the percent (A) of a number (B)?

Answer 6

Divide (A)/(B), and move the decimal two places to the right

Question 7

How do you factor percentage to decimals?

Answer 7

1) Write the percent over 100
2) if the percent is not a whole number, multiply it by 10, 100, or 1000 depending on how many digits are after the decimal.
3) simplify

Question 8

How do you factor fractions to percentages?

Answer 8

1) find a number you can multiply to get the denominator of 100
2) write the numerator after the % sign

Question 9

How do you factor decimals to fractions?

Answer 9

1) Write the decimal over /1
2) multiply this fraction by 10 for every number after the decimal
2) reduce this fraction

Question 10

How do you factor fractions to decimals?

Answer 10

1) find a number that you can multiply by the denominator to make it 10, 100, 1,000, etc
2) write down just the numerator
3) put the decimal in the right spot: to the left for every 0 in the denominator