Question

solve step by step
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Answer 1

Answer:

135

Step-by-step explanation:

given that ABC is a straight line it makes an angle of 180 degrees

angle ABD is half of a right angle meaning that it is 45 degrees

according to given figure

CBD+ABD=180

CBD+45=180

CBD=135

Answer 2

Answer:

angle DBC = 135°

Step-by-step explanation:

ABC is a line , and BD intersect it

angle ABC + angle DBC = 180°..........1

given angle ABD = (1/2) × (90°)

=> angle ABD = 45°

putting value of angle ABD in equation 1....

we get,

angle DBC = 180° - 45°

=> angle DBC = 135°