A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

WILL MEDAL AND FAN. Which statement about triangles is true? A. All acute triangles are also equilateral triangles. B. All right triangles are also isosceles triangles. C. All equilateral triangles are also acute triangles. D. Some obtuse triangles are also right triangles.

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @mathstudent55 @Chelsealee @superman36

  2. whpalmer4
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Let's work through them. Equilateral triangle: all sides (and angles) are equal Acute triangle: all angles less than 90 degrees Right triangle: 1 angle is exactly 90 degrees Isosceles triangle: two equal sides (and angles) Obtuse triangle: one angle greater than 90 degrees

  3. like1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    http://www.regentsprep.org/regents/math/geometry/gp5/LTriangle.htm

  4. like1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that may help

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok, thanks guys

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    My guess is that it's A.

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Am I correct?

  8. like1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes u r correct! :)

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok, I posted this question cause I wasn't sure if it was C or A

  10. like1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    1 Attachment
  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lel

    1 Attachment
  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    D

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  14. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443639604208:dw|

  15. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ^an acute triangle

  16. whpalmer4
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    well, it is cute, too :-) but as you have drawn it, it is actually obtuse, top angle slightly larger than 90 degrees

  17. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @ggcola Did you find the correct answer?

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Sorry I had to go somewhere to help my mom..so if A is wrong is it C? @mathstudent55

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1443640670135:dw|

  20. whpalmer4
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @ggcola I offered to work through them with you... As mathstudent55 showed, it is possible to make an acute triangle which is not an equilateral triangle. That rules out A We know that the sum of the interior angles of a triangle is 180 degrees, so it is not possible to have an obtuse triangle with a right angle, as those two angles alone would total more than 180 degrees. That rules out D You can make a right triangle with angles 30, 60 and 90 degrees. That is proof that not all right triangles are isosceles triangles. That rules out B. That leaves us with answer choice C: all equilateral triangles are also acute triangles. Well, if we have 3 equal angles and they total 180 degrees, each angle must be 1/3 of 180 degrees, or 60 degrees. 60 degrees is less than 90 degrees, so a triangle with 3 such angles is an acute triangle (all angles less than 90 degrees). Therefore, answer choice C is correct.

  21. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.