Given mEC = 136 and m CF = 74°, determine the measure of the angle m ZDBF.
(You may assume that point A is the center of the circle.)
1360
(Figure may nor be drawn to scale.)
A. 101°
B. 105°
C. 118°
D 121°

the diagram shows you   triangle def with de=4, df=9 and de≠df≠ef.

the sum of the lengths of two triangles' sides are always greater than the length of the third side:

substitute sides lengths:

then 5< ef< 13 (option 3 is true).

def is a scalene triangle with all sides of different lengths (option 5 is true, option 2 is false).

answer: correct choices are 1, 3 and 5

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