00:01
So for this assignment that you need help with, you need to find the number of diagonals, the measure of an interior angle, the measure of an exterior angle for a regular pentagon.
00:09
So a pentagon, this is what the shape looks like.
00:12
It has five sides.
00:16
And to figure out the number of diagonals for a pentagon, there is a formula.
00:23
And the formula is number of diagonals equals n multiplied by the quantity of n minus 3 divided by 2.
00:31
So n stands for the number of sides.
00:40
So for the diagonals, you're going to do 5, multiply by 5 minus 3 divided by 2.
00:53
So that's 5 times 2 divided by 2, which is 10 divided by 2, which equals 5.
01:00
So there are a total of 5 diagonals.
01:06
For the measure of an interior angle, we're going to use the form.
01:18
Formula for one interior angle, we're going to use 180 multiplied by the quantity of n minus 2 divided by n.
01:27
And n stands for the number of sides...