How to use polygon function to draw a triangle in pygame code example

Example 1: pygame draw circle

window = pygame.display.set_mode(300, 300)
colour = (0,0,255) #green
circle_x_&_y = (150, 50)
circle_radius = 12
border_width = 0 #0 = filled circle

pygame.draw.circle(window, colour, circle_x_&_y, circle_radius, border_width)

Example 2: pygame circle

circle(surface, color, center, radius)