Jump to content
BrainDen.com - Brain Teasers

harey

Members
  • Content Count

    191
  • Joined

  • Last visited

  • Days Won

    7

harey last won the day on January 12 2017

harey had the most liked content!

Community Reputation

8

About harey

  • Rank
    Advanced Member
  • Birthday February 26

Profile Fields

  • Gender
    Male

Recent Profile Visitors

5119 profile views

Single Status Update

See all updates by harey

  1.     90 -70= 20 deg using side of square as "a" , we have tan20 = o/a and then O= atan 20 or 0.3639a; The right leg of the  triangle and  the top portion of the right side               20 +45 =65 ; 90-65  =     25 degrees  the other angle at top left and therefore the 3rd angle is 65;                                 tan 25 = o/a  or  o = a tan25;        o = 0.4663a.   since a  is the length of a side then the bottom leg of the lower right triangle = 1 - 0.4663 = 0.5336a ;          the vertical leg of the lower triangle is 1 -   0.3639a  =     0.6360a.  we will designate the left angle of the bottom triangle as Y ,  So we can say Tan Y = o/a or 0.6360a / 0.5336a;      tan Y = 1.1917;  Y = 50    Adding the bottom angles we have 65 + 50 = 115 :   180 - 115 =65 degrees              X = 65 degrees

×
×
  • Create New...