Question

show that triangle ABD congruent to triangle ACD, hence prove that angle ADB = angle ADC=90°
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Answer 1

Answer:

Step-by-step explanation:

In ABD and ACD

AB =AC (side)

BD =CD (side)

AD is common (side)

Therefore ABD Is congruent to ACD (SSS congruence)

By cpct,

Angle ADB =ANgleACD

But ABD+ACD=180degrees (linear pair)

From cpct ACD+ACD=180

2ACD=180

ACD = 90 degrees

Answer 2

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