Question

in abc triangle d is a point on bc such that angle adc = 90 degrees then ad is called -------​

Answer 1

Answer:

7th

Maths

Congruence of Triangles

Criteria for Triangle Congruence

In Δ ABC , D is a point on ...

MATHS

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Asked on December 30, 2019 by

Rushi Kuruvila

In ΔABC, D is a point on BC such that AB = AD = BD = DC. then

∠ADC:∠C=4:1

State whether the above statement is true or false.

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ANSWER

Here, AB,BD,AD are sides of a triangle. These sides are given equal. Hence the triangle is an equilateral triangle.

Thus, ∠ADB=60

∘

In △ADC,

AD=CD

Thus, ∠ADC=∠ACD=y (Isosceles triangle property)

Now, ∠ADB=∠ADC+∠ACD

60=y+y

y=30

∘

∠ACD=30

∘

∠ADC+∠ADB=180 (Angles on a straight line)

60+∠ADC=180

∠ADC=120

∘

Hence,

∠C

∠ADC

=

30

120

∠C

∠ADC

=4:1

Step-by-step explanation:

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Answer 2

Answer:

Bzns

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