Question

Find the area of the trapezoid.

(1 point)
112.5 mm²
72 mm²
40.5 mm²
56.25 mm²

Answer 1

Area of a trapezoid is the average of the upper and lower bases times the height :)

Answer 2

how do you solve that?

Answer 3

So, the area is given by
\[\huge h \times \frac{UB + LB}{2}\]
Where UB is the length of the upper base and LB is the length of the lower base. (And h is height, of course :) )

Answer 4

im confused

Answer 5

Well, in your trapezoid, what's the length of the upper base? That's the horizontal line on top.

Answer 6

16*4.5/9?

Answer 7

thats way off

Answer 8

Take it slow. What's the length of the upper base?

Answer 9

16mm

Answer 10

That's right. Now the lower base?

Answer 11

9mm

Answer 12

Okay. Now get the average of 16mm and 9mm
What is it? :)

Answer 13

add it or multiply?

Answer 14

Average of two numbers.... Add them, and then divide the sum by 2 :)

Answer 15

Of course, in general, the average of n-numbers is their sum total divided by n.

Answer 16

idont know how to average the,

Answer 17

Average of two numbers is half of their sum.

for example, the average of 7 and 5
is half of the sum of 7 and 5
That is to say, half of 7+5, or half of 12, which is 6.

Answer 18

oh 12.5