SOLUTION: Opposite angles of a parallelogram measure (5x-26) degrees and (4x+4) degrees. Find the measures of all the angles.

Algebra ->  Parallelograms -> SOLUTION: Opposite angles of a parallelogram measure (5x-26) degrees and (4x+4) degrees. Find the measures of all the angles.      Log On


   



Question 1013322: Opposite angles of a parallelogram measure (5x-26) degrees and (4x+4) degrees. Find the measures of all the angles.
Found 2 solutions by fractalier, josmiceli:
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
opposite angles of a parallelogram are congruent. Thus
5x - 26 = 4x + 4
x = 30
which means these two angles are
5(30) - 26 = 150 - 26 = 124 degrees
The others are supplementary, or
180 - 124 = 56 degrees each

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Opposite angles of a parallelogram
are equal, so
+5x+-+26+=+4x+%2B+4+
+x+=+30+
The opposite angles are:
+5x+-+26+=+5%2A30+-+26+
+5x+-+26+=+124+
and
+4x+%2B+4+=+4%2A30+%2B+4+
+4x+%2B+4+=+120+%2B+4+
+4x+%2B+4+=+124+
--------------------
Let +y+ = one of the other opposite
pairs of angles. Since the angles of a
parallelogram add up to +360+ degrees,
+124+%2B+124+%2B+2y+=+360+
+2y+=+360+-+248+
+2y+=+112+
+y+=+56+
The angles are 56, 56, 124, and 124
check:
+2%2A56+%2B+2%2A124+=+360+
+112+%2B+248+=+360+
+360+=+360+
OK