Answer: x = 30
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Step-by-step explanation:
When adding three angles of any triangle, they always add up to 180
3x+2x+x = 180
6x = 180
x = 180/6
x = 30
This then means,
- 3x = 3*30 = 90
- 2x = 2*30 = 60
This triangle is a 30-60-90 triangle.