Question

Find the x of the triangle

Answer 1

Let the yellow dot equal to y In the diagram I drawn. NOW I WILL USE THE REASON SUM ANGLES OF A TRIANGLE 43°+57°+ YELLOW DOT=180°

`43 + 57 + y = 180 \\ 100 + y = 180 \\ y = 180 - 100 \\ y = 80`

THE YELLOW DOT FROM THE TRIANGLE ON THE RIGHT IS EQUAL TO THE DOT ON THE TRIANGLE ON THELEFT SIDE BY VERTICAL OPPOSITE

`x + x + y = 180 \\ 2x + 80 = 180 \\ 2x = 180 - 80 \\ 2x = 100 \\ (2x)/(2) = (100)/(2) \\ x = 50`

x=50°

HOPE THIS HELPS.

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