Draw two rows of five equilateral triangles, like rows of shark teeth. Use black outlines on a white canvas. Leave the triangles unfilled.

Each triangle has sides that are 50 steps long. In each row, triangles touch side by side. The rows do not touch each other.

The top row starts at (-125, 55). The bottom row starts at (-125, -55). For both rows, move the start point 50 steps right for each next triangle. This gives these start points in each row: -125, -75, -25, 25, and 75 for x.

Start each triangle facing right. The top row’s points face down; the bottom row’s points face up.

Write a function named draw_triangle that draws one triangle. It must take a turn_angle parameter. In the function, repeat three times: move forward 50 steps, then turn by turn_angle.

• Use -120 to make a triangle that points down.
• Use 120 to make a triangle that points up.

Call the function at all five start points in both rows. Use penup() and goto() to move between triangles without drawing connecting lines.