19-gon

## 19-gon

### Visual representation:

(drawn with rotation angle 0°)

triangle with vertices (0,0), (3,4), (4,3)

## triangle with vertices (0,0), (3,4), (4,3)

### Input interpretation:

triangle | vertex coordinates (0, 0) | (3, 4) | (4, 3)

### Visual representation:

isosceles right triangle with area 1

## isosceles right triangle with area 1

### Input interpretation:

isosceles right triangle | area 1

### Visual representation:

area of an equilateral triangle with side length a

## area of an equilateral triangle with side length a

### Input interpretation:

equilateral triangle | edge length a | area

### Result:

(sqrt(3) a^2)/4~~0.433013 a^2

nine point circle of triangle (1,1)(2,4)(3,3)

## nine point circle of triangle (1,1)(2,4)(3,3)

### Input interpretation:

triangle | vertex coordinates (1, 1) | (2, 4) | (3, 3) | nine point circle

### Result:

circle | center (9/4, 11/4)~~(2.25, 2.75) radius sqrt(5/2)/2~~0.790569

parallelogram side lengths 3,5 angle 60 degrees

## parallelogram side lengths 3,5 angle 60 degrees

### Input interpretation:

parallelogram |

edge lengths 3 | 5

interior angle 60° (degrees)

### Combinatorial properties:

vertices | 4 edges | 4

4ft by 7ft rectangle

## 4ft by 7ft rectangle

### Input interpretation:

rectangle | edge lengths 4 ft | 7 ft

### Visual representation:

(drawn with height 7 ft, width 4 ft, and rotation angle 0°)

diameter of a nonagon with apothem 4

## diameter of a nonagon with apothem 4

### Input interpretation:

regular nonagon | apothem 4 | diameter

### Result:

4 tan(pi/9) csc(pi/18)~~8.38408

diagonal intersections of a regular 17-gon

## Result:

2380

incircle of regular 7-gon

## incircle of regular 7-gon

### Input interpretation:

regular heptagon | incircle