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To find the measure of angles in a triangle using the Triangle Angle Sum Theorem, we need to set up an equation where the sum of all three angles is equal to 180 degrees.
For the first option:
Let the measure of angle C = 6x - 3
Let the measure of angle B = 5x + 4
Let the measure of angle A = 4x + 14
Set up the equation:
6x - 3 + 5x + 4 + 4x + 14 = 180
Combine like terms:
15x + 15 = 180
Subtract 15 from both sides:
15x = 165
Divide both sides by 15:
x = 11
Now, substitute x = 11 back into the expressions for the angles:
Angle C = 6(11) - 3 = 63°
Angle B = 5(11) + 4 = 59°
Angle A = 4(11) + 14 = 58°
Therefore, the angles of the triangle are 59°, 63°, and 58°.