60°
مل
+
550
Part A
Find the value of x in the diagram.

Let the third angle in the triangle = zNow, angle z + 60° + 55° = 180°Angle z = 180-115° = 65°angle z = 65°Now, angle z + angle y = 180° (linear pair) 65° + y = 180°angle y = 180°-65°angle y = 115°Now again, angle X + angle y = 180° (linear pair) 115° + angle x = 180°angle X = 180°-115°Angle x = 65°

Step-by-step explanation:

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Part A

x = 180 - 55 - 60 (angle sum of a triangle, vertically opposite angles)

x = 65

I’ll find y anyways:

y = 180 - 65 (angles on a straight line)

y = 115