1.

The external angles of a triangle from the three vertices are (2x + 30°), (3x – 10°), 100°. Find the value of x?

Answer»

2x + 30 + 3x – 10 + 100 = 360

5x + 120 = 360

5x = 360 – 120 = 240

∴ x = \(\frac{240}{5}\) = 48



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