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welcome to math with mr. J in this video

I'm going to cover how to name an angle

and we're going to go through two

examples together in order to get this

down so let's jump right into number one

here and the first thing we need to do

when naming an angle is find the vertex

and the vertex is where two lines or

line segments meet in order to create

the angle now the vertex is named by a

letter for number one we have a G here

corresponding to our vertex so after we

find the vertex we need to find a point

on each line segment or line that create

the angle so here we have a D this line

segment right here creates the angle and

this line segment here so we have a D up

there and we have a Z down here so once

we have the points on our line segments

and the vertex identified we are able to

name our angle so I'm going to start

here with the symbol that means angle

and now we start with one of our points

we're going to start with D so we start

with D here we go down to our vertex G

and then down to our other point on our

line segment Z so one of our names could

be angle D G Z now we can also start at

Z here go up the G so start at Z go up

to G and then finish by going up to D

now notice the order of our letters

represents the order of how we're

drawing that angle and the vertex is

always in the middle always in the

middle so we could either do angle D

GZ or angle Z G D now I'm going to give

you a couple of examples that do not

work we cannot do angle G Z D because if

we start at G and go down to Z and then

up to D that does not give us the angle

that we're looking for and we cannot do

D start at D no I'm sorry start a G go

up to D and then down to Z so we again

we cannot start a G go to D and then Z

the vertex needs to be in the middle so

let's go to number two here now this

looks a little different we have two

lines that intersect in order to create

angles so let's take a look at a down

here we need to find angle P F G so this

tells us start at P go to our vertex F

and end at Point G here so angle p FG

would be right here P F G so our angle

right here would be p FG now let's go to

B see if you can find angle G F a so we

started G we go into our vertex F and

then up to a so angle G FA would be

right here and then lastly see what is

another name for angle P F Y so p FY

would be right here P F Y another name

as long as we have the vertex in the

middle we could do Y F

P angle YF p start up top here F P so

there you have it there's how to name an

angle we find two points on the lines or

line segments and we also find that

vertex and we always put the vertex the

letter for the vertex in the middle of

our name

hopefully that helped thanks so much for

watching until next time peace