A triangle has angle measures 40 degrees, 40 degrees, and 100 degrees.

Which statements are true about the triangle? Select all that apply.
The triangle is acute.
The triangle is obtuse.
It is an isosceles triangle.
It is a scalene triangle.
It is an equilateral triangle.
The angles add up to 180°.

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one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

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