00:01
Given this figure here, we're going to name the polygons that appear, and then we're going to find the measure of the angles that surround point a.
00:10
So this here, polygon one is one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve sides.
00:22
So it is a twelve gone, and the name of a twelve gone is a didecagon.
00:36
And then we have here, we have the three -sided polygon, which is a triangle.
00:42
So the two types of polygons involved in this figure are a decagon and a triangle.
00:47
What is the measure of the angles surrounding point a? so we have an angle here, here, here, and here.
00:58
So we've got those three angles that surround point a.
01:03
This angle here, i'm going to erase this one in the triangle.
01:06
The other two angles are actually congruent because they're both part of the decagon, and it is a regular polygon, which means that all those angles are the same...