Question

13. In the figure, if a - b = 100° then what are the measures of a and b?



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Answer 1

a+b=180--(Linear Pair)

a-b=100---(Given)

add both equations

2a=280

a=140°

b=40°

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Answer 2

Answer:

a=140°   b=40°

Step-by-step explanation:

a - b = 100 (given)

a + b = 180 (linear pair)

subtracting them and we get

2a=280

a=280/2=140°

substituting a value in equation either i equation 1 or 2, we get

1) =>a - b = 100                                             2) => a+b=180                                                    

      140-b=100                                                      140+b=180

      140-100=b                                                      b=180 - 80  

      40°=b                                                              b=40°