What is the value of x in the triangle below

x = 71°

Step-by-step explanation:

The angles of any triangle will always amount to 180°.

Which means: (Angle of A) + (Angle of B) + (Angle of C) = 180°

Placing the known values into that equation will always let you know the third angle of any triangle.

(Angle of A) + (Angle of B) + (Angle of C) = 180°

(38°) + (71°) + (x) = 180°

109° + x = 180°

Solve for x by subtracting 109° from both sides

x = 180° - 109°

x = 71°

OR you can add the other two known angles 38° + 71° = 109°

This subtracted from the 180°

180° - 109° = 71°

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