Results 1 to 6 of 6

Math Help - The other acute angle of triangle

  1. #1
    Member
    Joined
    Oct 2007
    Posts
    77

    The other acute angle of triangle

    Problem says: A triangle has two acute angles. One angle is 25 degrees, so what is the other acute angle?

    --I'm not sure what to do here.....would I just subtract 25 from 90?

    Also, how would I figure out if it is possible to have a triangle with sides 5, 7, and 12?

    --I think it's possible but I'm not sure if I'm correct...I just added 5 & 7 and got 12...so that means the side with length of 12 would connect between sides of 5 & 7.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Nov 2007
    Posts
    54

    Acute angles

    I wonder if you mean right triangle?

    There are quite a few possibilities if all you know is one angle is 25 degrees and another is less than 90 degrees.

    You wonder:
    "Also, how would I figure out if it is possible to have a triangle with sides 5, 7, and 12"

    Cut three paper strips of length 5, 7, and 12 inches.
    See if you can make a triangle of it.
    Again, I wonder if you mean a right angle?

    Bye.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Oct 2007
    Posts
    77
    Neither of the problems specify that the triangle is a right triangle.




    I don't have a ruler...I'm out of town
    Follow Math Help Forum on Facebook and Google+

  4. #4
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    11
    Awards
    1
    To determine if 3 given lengths can be the sides of a triangle, remember this rule:

    The sum of the lengths of any two sides of a triangle must be greater than the length of the remaining side.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Oct 2007
    Posts
    77
    soooo, because the sides i added up, 5 & 7 are equal to the 3rd side, 12, it's not a triangle?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Apr 2008
    Posts
    8

    Thumbs up

    Quote Originally Posted by beetz View Post
    soooo, because the sides i added up, 5 & 7 are equal to the 3rd side, 12, it's not a triangle?
    that's right, you just get an amazing straight line

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: December 5th 2010, 10:15 PM
  2. Bisector of an acute angle (Help)
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: June 26th 2009, 11:09 PM
  3. Replies: 4
    Last Post: December 3rd 2008, 03:21 PM
  4. acute angle
    Posted in the Algebra Forum
    Replies: 2
    Last Post: February 27th 2008, 11:48 AM
  5. Acute angle
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: April 2nd 2007, 09:31 AM

Search Tags


/mathhelpforum @mathhelpforum