Question

solve this math problem​

Answer 1

Answer:

a=40 and b= 40

Step-by-step explanation:

a=180-140

=40

a=b -----(alternate angles)

therefore , b=40

Answer 2

Answer:

OPTION (2) IS CORRECT.

Step-by-step explanation:

GIVEN :

LINES l AND m ARE PARALLEL LINES.

TO FIND :

FIND THE VALUE OF a AND b.

SOLUTION :

$a + 140 = 180 \: \: \: linear \: pair \\ \\ a = 180 - 140 \\ \\ a = 40 \: degrees. \\ \\ but \: \: a = b \: \: alternate \: angles \: are \: equal. \\ \\ therefore \: \: \: b = 40 \: degrees.$

ANSWER IS OPTION (2) WHERE a = b = 40 degrees.