Which triangle is an obtuse scalene triangle? a triangle with angle measures of sixty, sixty, and sixty and all sides of equal length
a triangle with angle measures of thirty, seventy five, seventy five and two sides of equal length
a triangle with angle measures of ninety, twenty, seventy and no sides of equal length
a triangle with angle measures of one hundred twenty, thirty five, twenty five and no sides of equal length

I would just give the answer right here, but I'll leave it at the end so it makes more sense.

An acute triangle has a topmost angle measurement below 90 degrees.

A right triangle has a topmost angle measurement above 90 degrees.

An obtuse angle has a topmost angle measurement of above 90 degrees.

An isosceles triangle has two sides that are the same length, and one side that is a different length. The way I remember this is that the two s'es isolate the o when spelling it.

A scalene triangle has sides of different lengths. The way I like to remember this is - fish don't have equal scales.

An equilateral triangle has sides of equal measurement.

This means that it would be D.

:)

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