3 years ago

The value of x is _____

1 answer:

7 0

Angle TRS is equal to 180 - 9x (straight angles).

The sum of all the interior angles of a triangle is 180. Thus,

180 - 9x + 5x + 9 + x = 180, resulting in -9x + 5x + 9 + x = 0.
Then -4x + x = -9, or -3x = -9, or x = 3 (answer)

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