00:01
Identify the vertices, angles, and sides of each triangle, then answer the questions below using complete sentences.
00:08
So in order for us to understand this, i just defined all these terms that they are asking below, how would you define an angle, how would you define a vertex, and what is meant by a sign.
00:25
So on the right side, i put out the definition that an angle is formed by the intersection of two straight lines at a point.
00:34
Sides of an angle are when two straight lines that join to form an angle are the sides of that angle.
00:40
And then the vertex of an angle is the point at which two lines or rays meet to form an angle.
00:48
So looking at our figure, it's helpful to apply what we have as a definition.
00:55
Can understand it victorially what it means.
00:59
So first let's answer the first column.
01:03
It says vertices.
01:04
So like we said here, a vertex is the point at which two lines or rays meet.
01:11
So for our example, we have a ray or a line ab right here, a and b, a, sorry, meeting up with a .c at point a.
01:23
So then we know that a is a vertex, right? because a, b, and a c intersect at a.
01:33
And so that's a vertex.
01:36
And then b, c, and c and c meet at c.
01:43
So we can have that as a vertex.
01:46
And then the last one, a, b and b c intersect at b.
01:50
So that's also a vertex.
01:57
Now it's the same on the other figure here, qrs triangle.
02:03
So q is a vertex because qr and sq meet at q.
02:11
And they form an angle, right? and then there's r and then s.
02:16
Okay.
02:18
Now let's look at the definition of an angle...