3
A shape does not have a sum. You can sum its angles, the lengths of its sides, the areas of its faces and so on. But the shape does not have a sum, in itself.
Two.
A cone has no acute angles because a cone is a 3D shape and not a 2D.
Simple, by finding how many traingles there are in the shape through this formula 180(n-2). N stand for how many interior angles. Knowing how many triangles you can multiply it by 180 giving you the total degrees in the shape. Keep in mind this is only for a REGULAR hepatagon. Knowing the sum of the angles u can divide it by the total amount of angles and get the measure for each interior angle. This sounds confusing but it really isn't.
3
A shape does not have a sum. You can sum its angles, the lengths of its sides, the areas of its faces and so on. But the shape does not have a sum, in itself.
Two or three.
A octagon has 8 sides, 8 angles. An octagon is an eight sided shape
A cone has no acute angles because a cone is a 3D shape and not a 2D.
Simple, by finding how many traingles there are in the shape through this formula 180(n-2). N stand for how many interior angles. Knowing how many triangles you can multiply it by 180 giving you the total degrees in the shape. Keep in mind this is only for a REGULAR hepatagon. Knowing the sum of the angles u can divide it by the total amount of angles and get the measure for each interior angle. This sounds confusing but it really isn't.
Assuming it is a two dimensional shape, 12 sides implies 12 angles (interior or exterior).
If the shape has 3 angles in all, where two of the angles are acute, then the shape is a scalene triangle.
A dodecagon is a 12 sided shape that has 12 interior angles that add up to 1800 degrees and 12 exterior angles that add up to 360 degrees
A cube has 6 faces, each having 4 right angles, for a total of 24 angles.
A right angle = 90o angle. So, number of right angles in a 720o shape = 720 / 90 = 8.
The sum of the interior angles of any shape that has straight sides is(180 degrees) times (the number of sides - 2) .For the case of a hexagon, (the number of sides - 2) = 4 .The sum of the interior angles = (180) x (4) = 720 degrees.The sum of the exteior angles is always 360 degrees, no matterhow many sides the shape has.