Common Core Math Vocabulary

Right Angle - Definition with Examples

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What is a right angle?
In geometry, an angle that measures 90 degrees exactly is a right angle. It is formed by two perpendicular lines. 

A right angle is represented by the symbol ∟.

right angle

We can find right angles in shapes.

Right angle shapes

      Fun Facts :

  • All right angles are the same.
  • All right angles correspond to quarter of a complete turn.
  • All triangle with one angle right is always a right triangle.


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A quarter of a bangle.
Its arms don’t dangle,
Neither do they tangle,
Because it’s a right angle!!
You can see it in a right triangle!

Let's do it Let's do it!

Children can stretch out their arms to form right angles. Take the children out for a walk and have them spot right angles formed in things in their surroundings.

Right angle real life/Right angle activity
See also See also
Angle, Perpendicular Lines, Right Triangle

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