Match each set of vertices with the type of triangle they form.
a(2,0), b(3, 2), c(5, 1)
obtuse scalene triangle
a(4,2), b(6,2), c(5, 3.73)
eee
isosceles right triangle
a(-5,2), b(-4,4), c(-2,2)
right triangle
a(-3, 1), b(-3, 4), "c(-1,1)
acute scalene triangle
a(-4, 2), b(-2, 4), c(-1,4)

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

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)

step-by-step explanation: