Question

(a)What kind of triangle is ADC according to side

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Answer 1

Step-by-step explanation:

I think so it is an isosceles triangle

Answer 2

Answer:

Correct option is

C

15  

o

Step-by-step explanation:

ABC is an equilateral △.

⇒AB=BC=CD _____ (I)

BCDE is a square

⇒BC=CD=DE=EB ____ (II)

From (I) & (II)

AB=BC=CD=DE=EB

=CD

∵AC=CD

⇒△ACD is an isosceles triangle

We know that angle opposite to equal

sides of an isosceles triangle are equal

⇒∠ADC=∠CAD

Sum of angles of a triangle = 180  

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∠ADC+∠CAD+∠ACD=180  

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∠ADC+∠ADC+150  

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=180  

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  (∠ACD=∠ACB+∠BCD)

2∠ADC=30  

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∠ADC=15  

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∴∠ADC=15  

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HOPE THIS HELPS U