please help me i have no idea how to do this
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Answer:
b 84 degrees
Step-by-step explanation:
sum of all angles of a triangle =180 degrees
BEF is triangle
Answered by
0
Step-by-step explanation:
In tri. ABE
angle A + ABE + AEB =180°
90°+30°+AEB=180°
AEB=60°
In quad. CDEF
angle C+D+DEF+CFE = 360°
90°+90°+DEF+144°=360°
DEF=36°
Angle AEB+BEF+DEF = 180°
60°+BEF+36°=180°
BEF=84°
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