Question

Find the area of the trapezoid.

Answer 1

See http://www.mathsisfun.com/geometry/trapezoid.html#Area

Answer 2

Can you figure it out ?

Answer 3

i think but i am not sure

Answer 4

can you find the average length of the top and bottom?

Answer 5

no

Answer 6

add them up and divide by 2 to get the average

Answer 7

the average will be between the two numbers.

Answer 8

ok 18.5

Answer 9

almost. did you add wrong ?

Answer 10

no do i add all 3 numbers

Answer 11

add just the top and bottom and divide by 2

Answer 12

what is 15.8 + 21.8 ?

Answer 13

18.8

Answer 14

yes, that is right. the formula says the area is

\[ \frac{a+b}{2} \cdot h \]
where a is the top and b is the bottom. you now have the (a+b)/2 part
do you see what to do next ? (h is the height (or altitude))

Answer 15

so i would time h but 11.7?

Answer 16

yes, you replace h with the number 11.7
(a+b)/2 is 18.8
so the problem is now
18.8 * 11.7

Answer 17

i got 219.96

Answer 18

yes. that is the answer.

If it is multiple choice they may have rounded it to 220.
But the exact answer is 219.96

Answer 19

thank you so much

Answer 20

yw

Answer 21

If you learn how to interpret the formula, you can use your textbook or google to find the formula and replace the letters in the formula with the numbers they give you.

Answer 22

ok