Triangle Angle Sum Theorem Quick Check
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Question
Use the image to answer the question.
A triangle a b c is shown with angle a measuring 4 x plus 14, angle b measuring 5 x plus 4, and angle c measuring 6 x minus 3.
Use the Triangle Angle Sum Theorem to find the measure of the angles for the triangle in the diagram.
(1 point)
Responses
59°, 63°, and 48°
59 degrees , 63 degrees , and 48 degrees
59°, 58°, and 63°
59 degrees , 58 degrees , and 63 degrees
54°, 44°, and 82°
54 degrees , 44 degrees , and 82 degrees
57°, 54°, and 69°
To find the measure of the angles in the triangle, we can set up the equation:
(angle a) + (angle b) + (angle c) = 180°
Substituting the expressions for the angles:
(4x + 14) + (5x + 4) + (6x - 3) = 180
Combine like terms:
15x + 15 = 180
Subtract 15 from both sides:
15x = 165
Divide both sides by 15:
x = 11
Now we can find the measure of each angle by substituting x = 11 into the expressions:
angle a = 4x + 14 = 4(11) + 14 = 44 + 14 = 58°
angle b = 5x + 4 = 5(11) + 4 = 55 + 4 = 59°
angle c = 6x - 3 = 6(11) - 3 = 66 - 3 = 63°
Therefore, the measure of the angles in the triangle is 58°, 59°, and 63°.