Concept 2 of 6
Sides & Corners
Today's big idea
A shape's number of corners always equals its number of sides.
A pentagon has 5 sides; a hexagon has 6.
How it works
👀 What's going on?
Count the straight edges and the pointy corners to know a shape.
💡 Here's the trick
A side is a straight edge, and a corner is where two sides meet. A pentagon has 5 sides, and a hexagon has 6.
A triangle has 3 sides and 3 corners. A pentagon has 5 sides and 5 corners.
✍️ Try it
How many corners does a hexagon have? → 6.
⚠️ Watch out
A shape's number of corners always equals its number of sides.
Watch me solve one
Quanta solves it
“Watch how I think through one of these — then you try.”
THE PROBLEM
“How many corners does a hexagon have?”
- 1
Remember the rule
Corners always equal sides.
- 2
Count the sides
A hexagon has 6 sides.
- 3
So the corners
6 sides means 6 corners.
- 4
Answer ✓
6
Now you try one — same steps, different story 👇
See it in action
⚡ Time to play!
Tap each side of the shape to count them.
Sides counted: 0 / 5
Quick check
✅ VERIFICATION
How many sides does a pentagon have?
⚡ Finish the activity above first to answer.
Keep going!
Up next: Solid Shapes
Cubes, spheres, cylinders and cones are 3D.