Bd is a diameter of circle o. if m∠acb = 30°, what is m∠dba?

m∠DBA = 60º

Step-by-step explanation:

Angle subtended by the diameter is 90º :

⇒ m∠DAB = 90º

Angles in a circle formed by the same arc are equal :

⇒ ∠ ADB = ∠ACB

⇒ m∠ ADB  = 30º

Sum of angles in a triangle is 180º :

⇒ m∠DBA + m∠DAB + m∠BDA = 180º

⇒ m∠DBA = 180° - 90° - 30°

⇒ m∠DBA = 60°

it is 60

Step-by-step explanation:

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irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: