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If Triangle ADC is congruent to Triangle BDC, then the measure of angle BCD= what degrees? 

Angle A= (56-3a)

Angle D= 107

Angle B= (8a+1)

Angle C= ( we do not have)

 

Please help!!

 Jan 23, 2021
 #1
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Angle A = Angle B

56  - 3a =   8a + 1    rearrange as

56 -1  = 8a + 3a

55  = 11a

Dived both sides  by  11

5  =a

So angle  B  =8(5) + 1 =   41° 

 

We know that angle D  =107°

 

Therefore, angle C   = 180   - 107    - 41   =   32°

 

 

cool cool cool

 Jan 23, 2021

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