How to know if my mouse is over an object?

I am creating a game where if you click a square it changes colors. I want to make the player able to choose the size of his gameboard. To do that I want to use triangles. I am using create_polygon(x,y,...) and I know it has a widget activedash. I was wondering is there any way to get recieve the activedash signal somehow if the player clicks on the object.

I tried the folowing

if  väiksemk.tk.active==True:
    print("works")

but it didn't work.

Here is my code

from tkinter import*
import time
raam = Tk()
tahvel = Canvas(raam, width=700, height=700, background="wheat")
tahvel.grid()
raam.resizable(0,0)

tahvel.create_rectangle(450,375,250,325,fill="green")
tahvel.create_text(350,350,text="alusta",fill="black")
tahvel.create_text(175,470,text="mängulaua laius", fill="black",font=(30))
tahvel.create_text(175,490,text="mängulaua kõrgus", fill="black",font=(30))
väiksemk=tahvel.create_polygon(250,470,270,480,270,460,fill="black",activefill="white")    

klõps=0
värv=[[0 for i in range(25)]for i in range(25)]
värv2=[[0 for i in range(25)]for i in range(25)]
laius=25
kõrgus=25
    
def hiir(event):
    global klõps
    if klõps==0:
        if event.x<450 and event.x>250 and event.y<375 and event.y>325:
            tahvel.delete("all")
            klõps=1
            ruudustik()
        else:
            0
    elif klõps==1:
        x=event.x
        y=event.y
        värvi(x,y)

def ruudustik():
    a=100
    b=0
    global laius
    global kõrgus
    while a<laius*20+120:
        tahvel.create_line(a,b,a,laius*20+100)
        a+=20
    a=0
    b=100
    while b<kõrgus*20+120:
        tahvel.create_line(a,b,kõrgus*20+100,b)
        b+=20
        
    a=100
    b=0
    while a<laius*20+120:
        tahvel.create_line(a,b,a,laius*20+100,width=5)
        a+=100
    a=0
    b=100
    while b<kõrgus*20+120:
        tahvel.create_line(a,b,kõrgus*20+100,b,width=5)
        b+=100
    

def värvi(x,y):
    a=0
    if x<100 or y<100 or x>600 or y>600:
        0
    else:
        if värv[x//20-5][y//20-5]==0:
            värv2[x//20-5][y//20-5]=tahvel.create_rectangle(x//20*20,y//20*20,x//20*20+20,y//20*20+20, fill="black")
            värv[x//20-5][y//20-5]=1
        elif värv[x//20-5][y//20-5]==1:
            tahvel.delete(värv2[x//20-5][y//20-5])
            värv[x//20-5][y//20-5]=0
            
            
raam.bind_all("<1>", hiir)
raam.mainloop()
    

It is in estonian if you want to understand the text and variable names. Thanks for your help.

One way to find any object in Canvas is to bind the canvas to 'Motion'. Then use a simple callback function to extract the information from the object. The following code demonstrates one way this can be achieved.

import tkinter as tk

app = tk.Tk()
main = tk.Canvas(app)
main.grid(sticky = tk.NSEW)

def callback(event):
    obj = main.itemcget("current", "fill")
    if obj:
        x, y = event.x, event.y
        print(obj, main.type("current"), main.find_closest(x,y))

main.bind("<Motion>", callback)

A = main.create_rectangle(20, 20, 100, 100, fill = "red")
B = main.create_oval(120, 20, 100, 100, fill = "yellow")

app.mainloop()