Question

please help me please!!!

step-by-step
ABC is a triangle with AB=AC.
D is a Mid-point of BC.

prove that angle ADB Is a right angle.
as congruence

Answer 1

Answer:

HERE IS YOUR ANSWER!!

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Answer 2

Step-by-step explanation:

I am writing just the explanation. Draw the figure on your own.

ABC is a traingle.

In ABD and ACD,

AB = BC (given)

BD = CD (D is midpoint of BC)

AD = AD(common)

Therefore,

ABD is congruent to ACD

(by SAS congruency)

Therefore,

angle ADB = angle ADC (by CPCT)

Let angle ADB = angle ADC = x

angle ADB + angle ADC = 180°

(Linear pair)

x + x = 180°

2x = 180°

x = 90°

Therefore,

angle ADB = angle ADC = 90°

Triangle ADB is a traingle with one angle 90°. Therefore, it is a right angled traingle.

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