Math help please?

Can somene please help me with these math problems??





1. Triangle A B C is with segment A D is drawn from vertex A to side B C.


Given segment DB is congruent to DC and segment A D is perpendicular to segment BC determine which of the following describes segment A D in triangle A B C .





A)Median


B)Altitude


C)All of the above





2. Triangle D E F with median E G from vertex E is drawn to side D F.


Given. Segment EG is an altitude of triangle DEF. Angle DGE= 15y - 30.


Find the value of y.








A)8


B)12


C)16














3. Triangle D E F with segment is drawn inside from vertex point E to midpoint of side D F. Is segment E G a midsegment, perpendicular bisector, median or an altitude?








A)Perpendicular bisector


B)Median


C)Altitude

Math help please?
1.


Since segment DB is congruent to DC, therefore AD is a median. Since AD is perpendicular to segment BC, therefore AD is an Altitude


C) All of the above





2.


Since EG is an altitude of triangle DEF, therefore EG is perpendicular to DF, so:


15y - 30 = 90


15y = 90 + 30


15y = 120


y = 120/15


y = 8


A) 8





3.


A line from a vertex through the midpoint of the opposite side is a median


B)Median





I hope this helped





Kia