How to replace red shap on google map with circle googlemap

[ahmed elbarbary]

How to use circle on googlemap to location have latitude and longtude ?

I work on angular 7 

I use red shap on googlemap have latitude and longtude on component 

 i need only to make circle on map to the point have latitude and longtude

but i dont need to use red mark on map as following :

 

i need to replace it with circle 

so how to do that please ?

import { Component, AfterViewInit, ViewChild, ElementRef } from '@angular/core';  
 
@Component({  
  selector: 'app-root',  
  templateUrl: './app.component.html',  
  styleUrls: ['./app.component.css']  
})  
export class AppComponent implements AfterViewInit {  
  title = 'angular-gmap';  
  @ViewChild('mapContainer', { static: false }) gmap: ElementRef;  
  map: google.maps.Map;  
 
 lat = 40.73061;  
 lng = -73.935242;  
 
  coordinates = new google.maps.LatLng(this.lat, this.lng);  
 
  mapOptions: google.maps.MapOptions = {  
    center: this.coordinates,  
    zoom: 8  
  };  
 
  marker = new google.maps.Marker({  
    position: this.coordinates,  
    map: this.map,  
    title: 'Hello World!'  
  });  
  ngOnInit() {  
     
    console.log("Hi man");  
   // this.mapInitializer();  
  }  
  ngAfterViewInit() {  
    console.log("Hi women");  
    this.mapInitializer();  
  }  
 
  mapInitializer() {  
    this.map = new google.maps.Map(this.gmap.nativeElement, this.mapOptions);  
    this.marker.setMap(this.map);  
  }  
}  

as sample above i need to use circle on  point 

lat = 40.73061;

lng = -73.935242;

without using marker 

so what i change on code to do that?