blazecarley
29.01.2021 •
Mathematics
Given Triangle DEF is isosceles and angle D is the vertex angle, Find x, DE, DF, EF
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Ответ:
x=2;DE,EF=9,DF=5
Step-by-step explanation:
Since DEF is isoceles, you can set the equations
x+7 and 2x+5 equal to each other
x+7=2x+5, now solve for x
-x=-2,
x=2, now plug in for each side
DE,EF=9
DF=3(2)-1=5
Ответ:
A
Step-by-step explanation:
I did it and it is right hope this helps