Sides and Corners - Number of sides - Number of corners - Triangle ... - Free Printable

Let’s go shape by shape and count the sides and corners.

First, look at the triangle:
- It has 3 straight lines → that’s 3 sides.
- Where two sides meet, that’s a corner → 3 corners.

Next, the square:
- 4 straight lines → 4 sides.
- 4 places where lines meet → 4 corners.

Then, the pentagon (5-sided shape):
- Count the sides: 1, 2, 3, 4, 5 → 5 sides.
- Corners? Also 5 — one at each point.

Now, the hexagon (6-sided shape):
- Sides: 1, 2, 3, 4, 5, 6 → 6 sides.
- Corners: also 6.

Last, the octagon (8-sided shape):
- Sides: let’s count carefully — top, bottom, left, right, and four diagonals → total 8 sides.
- Corners: same as sides → 8 corners.

So for every shape here, the number of sides equals the number of corners. That’s true for all regular polygons like these.

Final Answer:
Triangle: 3 sides, 3 corners
Square: 4 sides, 4 corners
Pentagon: 5 sides, 5 corners
Hexagon: 6 sides, 6 corners
Octagon: 8 sides, 8 corners