Answers

  • Brainly User
2014-11-15T15:49:20+05:30
69 +2x =180
2x = 111
x = 55.5 degrees

If 69 and x are equal angles, x=69.

if x isthe third angle, x = 180-138 =42
Therefore sum is 69+55.5+42 = 166.5 degrres
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2014-11-15T20:18:16+05:30
In any isosceles triangle angles opposite to the congruents sides are also congruent.So any two angles inĀ  this triangle must be equal.
The three possibilities are:
1. the 69 degrees and x degrees are congruent angles.
2. There are two 69 degree angles. Sum equals 69+69=138
Since, the sum of the three angles=180
69+69+x=180
x=180-138=42 degrees
3. Other possibility is , there are two angles of x degrees, then
x+x+69=180
2x+69=180
2x=111
x=55.5 degrees
The sum of all these possibilities = 69+42+55.5=166.5
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