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Byju's Answer
Standard XII
Mathematics
Projection Formula
Appolinus The...
Question
Appolinus Theorem :}To prove :- AB^2 + AC^2 =( AD^2 +DC^2 )
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Q.
In
△
ABC, AD is a median. Prove that
A
B
2
+
A
C
2
=
2
(
A
D
2
+
D
C
2
)
.
Q.
If ABC is an isosceles triangle and D is a point of BC such that AD ⊥ BC, then
(a) AB
2
− AD
2
= BD.DC
(b) AB
2
− AD
2
= BD
2
− DC
2
(c) AB
2
+ AD
2
= BD.DC
(d) AB
2
+ AD
2
= BD
2
− DC
2