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that is a square with a triangle inside turned

Q: What is a 3 sided shape that has one angle that is 90 degrees?

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Obtuse triangle: a triangle with one angle greater than 90 degrees.

Each interior angle measures 160 degrees

a one sided shape is called a henagon and a 2 sided shape is called a digon

A 20 sided shape has 209 diagonals i worked it out by drawing a table and split it into 4 colunms. I named the first one Name of polygon and the second one Number of sides the next one, Angle at centre and the last one Diagonals. I started with a Triangle which has 3 sides and its angle at centre is 120 degrees but, it doesn't have any diagonals so i put 0. Next i used a quadrilateral which has 4 sides and its angle at centre is 90 degrees and, it does have diagonals it has 2. Afterthat i put down a pentagon which has 5 sides its angle at centre is 72 degrees and it has 5 diagonals. I kept the process going so i put down Hexagon, Heptagon, Octagon, Nonagon and finally Decagon when, i had finished filling in the rest this was my results:Hexagon= Had 6 sides its angle at centre 60 degrees and its diagonals 9Heptagon= Had 7 sides its angle at centre 51.5 degrees and its diagonals 14Octagon= Had 8 sides its angle at centre 45 degrees and its diagonals 20Nonagon= Had 9 sides its angle at centre 40 degrees and its diagonals 27Decagon= Had 10 sides its angle at centre 36 degrees and its diagonals 35this is my results just for DiagonalsTriangle=0Quadrilateral=2Pentagon=5Hexagon=9Heptagon=14Octagon=20Nonagon=27Decagon=35Can you see a pattern?well i can see a pattern that adds a different number every time which is:it adds 2it adds 3it adds 4it adds 5it adds 6it adds 7it adds 8it adds 9so for a 20 sided shape you need to take 35 and add on 10 etc to 20. This is my results:35 + 9 = 4444 + 10 = 5454 + 11 = 6565 + 12 = 7777 + 13 = 9090 + 14 = 104104 + 15 = 119119 + 16 = 135135 + 17 = 152152 + 18 = 170170 + 19 = 189189 + 20 = 209So the answer is 209 diagonals on a 20 sided shape :-P

A circle cannot have 10 sides, it has only one, uniformly curved side.

Related questions

Obtuse triangle: a triangle with one angle greater than 90 degrees.

Each interior angles measures 165 degrees

If the shape is a 4 sided quadrilateral then the 4th angle is: 360-110-90-110 = 50 degrees

A three sided shape is a triangle but the given angles are incorrect because a triangle can't possibly have a right angle and an obtuse angle because its 3 interior angles must add up to 180 degrees.

Exterior angle = 360/16 = 22.5 So interior angle = 180 - 22.5 = 157.5 degrees.

Five sided and Five angle shape can only mean one thing you nimrods its a pentagon.

A nine sided shape that is called a regular nonagon.

A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.

If this shape is a regular 12-sided polygon, then the sum of its angles is 1,800 degrees [(n -2)180]. So the measure of one angle is 150 degrees (1,800/12), and the exterior angle is 30 degrees (180 - 150).

An irregular pentagon.

168 degrees

The third angle of what shape?