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dsp73
4 years ago
7

Find ∠ABD if ∠ABC = 121° in the given figure.

Mathematics
2 answers:
siniylev [52]4 years ago
7 0

Answer:

81°

Step-by-step explanation:

∠ABC= 121°

  • 4x+21+3x-5=121
  • 7x+16=121
  • 7x= 105
  • x=105/7
  • x=15°

∠ABD= 4*15°+21°= 81°

Natalka [10]4 years ago
7 0

Answer:

81

Step-by-step explanation:

ABD + BDC = ABC

4x+21 + 3x-5 =121

Combine like terms

7x +16 = 121

Subtract 16 from each side

7x+16-16 = 121-16

7x =105

Divide each side by 7

7x/7 =105/7

x=15

We want to find ABD

ABD = 4x+21

       = 4*15+21

      = 60+21

     =81

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