A community for students.
Here's the question you clicked on:
 0 viewing
xxloserlikemexx
 2 years ago
The figure below shows AB = 3 units and BD = 4 units.
If the area of triangle ADE is 60 square units, what is the area of the trapezoid BCED? (4 points)
11.02 square units
24.56 square units
48.98 square units
53.84 square units
xxloserlikemexx
 2 years ago
The figure below shows AB = 3 units and BD = 4 units. If the area of triangle ADE is 60 square units, what is the area of the trapezoid BCED? (4 points) 11.02 square units 24.56 square units 48.98 square units 53.84 square units

This Question is Closed

xxloserlikemexx
 2 years ago
Best ResponseYou've already chosen the best response.0@AccessDenied Do you mind looking at this quickly?

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2It looks to me like you should find the similarity ratio / area ratio between the two triangles and find the area of the smaller triangle. Then, subtract the smaller triangle's area from the larger triangle's area, which will just leave the trapezoid's area.

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2dw:1338849509649:dw

xxloserlikemexx
 2 years ago
Best ResponseYou've already chosen the best response.0Is it C? I'm still a bit confused.

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2Well, how did you get C?

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2C is correct, just curious what you're confused on tho.

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2We have two similar triangles (the three angles are congruent so by definition they are similar). So, we can use their similarity ratio: 3:(3+4) = 3:7 and then find the area ratio (a:b)^2 9:49 To find the area of the smaller triangle by creating a proportion. \[ \frac{9}{49} = \frac{x}{60} \] This proportion comes from the idea that their areas will always simplify to this ratio. So, we can solve for x here by crossmultiplying and then dividing off the 49. From there, we just have to subtract off from 60 (the value of x (the smaller area) and we will get the area of the remaining part: dw:1338850192482:dw

xxloserlikemexx
 2 years ago
Best ResponseYou've already chosen the best response.0Okay! I understand it now. Thanks so much!

AccessDenied
 2 years ago
Best ResponseYou've already chosen the best response.2You're welcome. :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.