Answer: Measure of angle 1 is 13.84° .
Step-by-step explanation: Given angle 2 = (5x+14)°
angle 3 = (7x-14)°.
Let the angle 1 be x°,
As we know m∠1+m∠2+m∠3 = 180° (Angle sum property)
x°+(5x+14)+(7x-14) = 180°
x°+12x = 180°
13x = 180
x = 180/13 = 13.84°
∴Measure of angle 1 is 13.84°
