Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (welshfella):
area = 0.5h ( a + b) where a and b are the parallel sides and h = perpendicular distance between them
OpenStudy (welshfella):
lol/1 they've lost interest!
OpenStudy (welshfella):
oh i take that back - sorry
OpenStudy (peachy1):
im here :D your fine welshfella
OpenStudy (welshfella):
lol
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (peachy1):
so a is triangle yes?
OpenStudy (mathstudent55):
This shape is called a trapezoid.
There is a formula for a trapezoid.
in this case there is no need to break up the figure into simpler shapes.
OpenStudy (peachy1):
ok
OpenStudy (welshfella):
no a and b are the measures of parallel sides:- 8 and 11
OpenStudy (peachy1):
oh ok that makes sence
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (mathstudent55):
|dw:1460569659639:dw|
OpenStudy (peachy1):
8 + 11 =19
OpenStudy (welshfella):
as the 2 angles at one end are both 90 degrees the value of h = 4
OpenStudy (mathstudent55):
The two vertical sides of 8 in. and 11 in,. are called the bases.
In the formula, they are a and b.
Start by adding a and b, so add 8 in. and 11 in.
Then multiply by the height, h.
Your height is 4 in.
Then divide by 2.
OpenStudy (welshfella):
yes so the final step is to multiply 19 by (4/2)
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (mathstudent55):
@Peachy1
gtg, but you're in good hands. @welshfella knows his stuff!
OpenStudy (peachy1):
okay bye :)
OpenStudy (peachy1):
8 + 11 =19 then 19 x 11? then divide by 2?
OpenStudy (welshfella):
no we have worked out 8 + 1 by 19
now we multiply that by 4
then finally we divide by 2.
OpenStudy (welshfella):
* 8 + 11
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (welshfella):
19 * 4
OpenStudy (welshfella):
19 * 4 = 76 right?
OpenStudy (peachy1):
im back my computer is freezing all of a suddin
OpenStudy (peachy1):
yes
OpenStudy (welshfella):
now finally to find the area we divide this by 2
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (peachy1):
76 divide by 2 =38
OpenStudy (welshfella):
thats it
another way to have done this would be to split it up into a rectangle and a triangle and add these 2 areas. But its easier to use the formula for area of a trapezoid.
OpenStudy (peachy1):
ok can you help me with one more and then look over my test?
OpenStudy (welshfella):
i have only 10 minutes so I'll do what i can in this time.
OpenStudy (peachy1):
ok
Still Need Help?
Join the QuestionCove community and study together with friends!