this one, t
Vertical angles are always equal
When two straight lines cross they always create two pairs of
equal opposite angles, called vertical angles.
Each angle has to form a supplementary pair with either of
the angles on the other side of it, so they must be equal.
finding missing angles
Save yourself a ton of
math by spotting equal
pairs of vertical angles.
These two are
So if y
angle and y
ou get 180º.
must be equal
his is one
Patterns in geometry aren’t just coincidence
These relationships are how geometry works…and to see a
really freaky one, try this:
you are here 4 19
On some scrap paper, draw a triangle using a ruler.
Cut the triangle out.
Tear the corners off.
And then put the three corner pieces together with
the points in the middle.