The measure of third angle is 70 degree
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Solution:</u></h3>
Given that, a navel distress signal flag is in the shape of a triangle
Two of the three angles measure 55 degrees each
We know that there are three angles in triangle
The angle sum property of a triangle states that the angles of a triangle always add up to 180°
Every triangle has three angles and whether it is an acute, obtuse, or right triangle, the angles sum to 180°
Let three angles be "A", "B", "C"
Given that two angles measure 55 degrees each. Let say angle A = angle B = 55
<em><u>By angle sum property of triangle,</u></em>
Angle A + angle B + angle C = 180 degree
55 + 55 + angle C = 180
110 + angle C = 180
angle C = 180 - 110 = 70 degree
Thus the measure of third angle is 70 degree
