Use the regular octagon below for 1 - 2.
1. (c) using the diagram above, draw diagonals. how many
triangles are created?
2. (c) using any method, determine the sum of the interior angles
of the regular octagon, and the measure of each interior angle.
3. (b) a polygon has an interior angle sum of 2520°. how many
sides must the polygon have? show all work.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)