If all the angles are equal and acute, it will be an equilateral triangle.
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The shape of the twelfth figure is a dodecagon. A dodecagon is a polygon with twelve sides and twelve angles. It is a regular dodecagon if all its sides and angles are equal. The interior angles of a regular dodecagon measure 150 degrees each.
We need more information ! Any regular polygon has equal angles !
For a figure to be regular, all its sides and angles must all be congruent. So if a pentagon is regular, all of its sides and angles are equal to each other.
The figure is a Regular polygon.
There is no limit to the number of obtuse angles a figure can have. A regular n-gon has n obtuse angles where n is any positive integer greater than 4.