In triangle abc, m? bac = 50°. if m? acb = 30°, then the triangle is triangle. if m? abc = 40°, then the triangle is triangle. if triangle abc is isosceles, and ab = 6 and bc = 4, then ac =

use the pythagorean theorem: a^2 + b^2 = c^2

6^2 = 36

4^2 = 16

36-16 = 20.

the square root of 20 is either a.) the square root of 20 or b.) 4.4721... (rounded 4.5)

here is your mark brainliest

d

step-by-step explanation: