In Fig 3 , ABC is a right triangle , right angled at C and D is the midpoint of BC . Prove that AB2= 4AD2 - 3AC2
Answers
Answer:
Step-by-step explanation:
it is given that triangle ABC is a right angled triangle right angled at C and D is the mid point of bc . by applying pythagoras theorem in triangle ABC , we get AB2=AC2+BC2 =AC2+(2CD)2 (SINCE D IS THE MID POINT OF BC) =AC2+4CD2 =AC2+4(AD2_AC2) ( SINCE IN TRIANGLE ACD WE GET AD2=AC2+CD2) =AC2+4AD2_4AC2 =4AD2_3AC2
THEREFORE , AB2=4AD2_3AC2.