In the given diagram, which of the following can you use to prove that triangle abc is an isosceles triangle? show the slopes of ab and cd are negative reciprocals. show that d is the midpoint of ab. show that cd = ad = db. a. i only b. ii only c. iii only d. i and ii e. i, ii, and iii

The answer is I and II so .D

Step-by-step explanation:

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0

sas (side angle side)

aa(angle angle)

sss(side side side)

sas you have to find two sides with an angle in between

aa you find two angles because it will always add up to 180

sss find all sides

step-by-step explanation: