Question 1a: Extending Geometric Shapes (2 points) Add the method area to the cl

Question

Question 1a: Extending Geometric Shapes (2 points) Add the method area to the classes Line and Rectangle that returns the area of the given shapes. The area of a line is always 0 class Shape: def setorigin(self, x, y): self.x, self.y- x, y def move(self, dx, dy): """Move by dx and dy"" self.x, self.y self.x + dx, self.ydy class Line(Shape): def-init--(self, x, y, u, v): "Line with start point (x, y) and end point (u, v)" Shape.setOrigin(self, x, y) self , u, self .v u, v def move(self, dx, dy): Shape.move(self, dx, dy) self , u, self.v self.u + dx, self .v + dy def area (self) pass # Replace this line with your body def str_(self): return "Line from"str(self.x) +", str(self.y) ") to (" str(self.u)", " str(self.v) + ")" class Rectangle(Shape): def _init__(self, x, y, w, h): Rectangle at (x, y) with width w and height h"" Shape.setOrigin(self, x, y) self , w, self . h w, h def area(self) pass # Replace this line with your body def str (self): return "Rectangle at (" str(self.x)", " + str(self.y) "), width"str(self.w) +", height "str(self.h) r Rectangle(-2, -3, 2, 3) 1 = Line(1, 2, 5, 6) str(r) "Rectangle at (-2, -3), width 2, str(1) "Line from (1, 2) to (5, 6)" height 3"

Explanation / Answer

import math;

class Shape:
    def setOrigin(self,x,y):
        self.x,self.y = x,y
    def move(self,dx,dy):
        self.x,self.y = self.x + dx,self.y + dy

class Line(Shape):
    def __init__(self,x,y,u,v):
        Shape.setOrigin(self,x,y)
        self.u,self.v = u,v
    def move(self,dx,dy):
        Shape.move(self,dx,dy)
        self.u,self.v = self.u+dx,self.v+dy
    def area(self):
        return abs(self.u - self.x)+abs(self.v-self.y);
    def __str__(self):
        return "Line from ("+str(self.x)+", "+str(self.y)+") to ("+str(self.u)+", "+str(self.v)+")"

class Rectangle(Shape):
    def __init__(self,x,y,w,h):
        Shape.setOrigin(self,x,y)
        self.w,self.h = w,h
    def area(self):
        return self.w*self.h;
    def __str__(self):
        return "Rectangle At ("+str(self.x)+", "+str(self.y)+") Width : "+str(self.w)+", Height : "+str(self.h)

class Circle(Shape):
    def __init__(self,x,y,r):
        Shape.setOrigin(self,x,y)
        self.r = r
    def area(self):
        return math.pi*self.r*self.r;
    def __str__(self):
        return "Circle At ("+str(self.x)+", "+str(self.y)+") Radius : "+str(self.r)

class Polygon(Shape):
    def __init__(self,x):
        Shape.setOrigin(self,x[0][0],x[0][1])
        self.cord = x
    def move(self,dx,dy):
        for i in range(0,len(self.cord)):
            self.cord[i] = (self.cord[i][0]+dx,self.cord[i][1]+dy)
    def area(self):
        ar = 0.0;
        for i in range(0,len(self.cord)-1):
            ar = ar + abs(self.cord[i][0]*self.cord[i+1][1] - self.cord[i+1][0]*self.cord[i][1]);
        return ar;
    def __str__(self):
        s = "Polygon At ("+str(self.x)+", "+str(self.y)+") Co-ordinates : "+str(self.cord)
        return s

class Group:
    def __init__(self):
        self.c = set()
        self.area = 0.0
    def add(self,s):
        self.c.add(s)
        self.area = self.area + s.area()
    def move(self,dx,dy):
        for s in self.c:
            s.move(dx,dy)
    def area(self):
        return self.area
    def __str__(self):
        r = "Group With:"
        for s in self.c:
            r = r + " " + str(s)
        r = r + " Total Area : "+str(self.area);
        return r

c = Circle(0,0,4)
l = Line(0,0,5,8)
r = Rectangle(0,5,6,8)
p = Polygon([(0,0),(1,0),(3,0),(5,6),(3,6),(3,0)])
g1 = Group()
g1.add(p)
g1.add(c)
g1.add(l)
g1.add(r)
print(g1)

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