No, all angles of an equilateral triangle are 60 degrees, to be obtuse he angle must be greater han 90 degrees but lesser than 180 degrees. (90<obtuse<180)
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No. It is not possible to make a equilateral triangle that is obtuse.
There cannot be an obtuse equilateral triangle. A rhombus is an equilateral quadrilateral with two obtuse angles (and two acute ones). Not sure if that counts as an obtuse equilateral. All regular polygons with more than four sides will be obtuse and equilateral. There are also other polygons that will meet these requirements. These will be squashed polygons in the same way that a rhombus is a squashed square.
No because an equilateral triangle is a regular polygon whereas an obtuse triangle is irregular
No if one angle is obtuse then they can't all be obtuse
no