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:

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

i think that you should ask google for the answer to that problem because if we don't know it google does