A circle is centered on point B. Points a, c and d lie on its circumference.

if angle ADC measures 23°, what does angle ABC measure?

Step-by-step explanation:

step 1

we know that

The inscribed angle is half that of the arc it comprises.

so

we have

so

step 2

we know that

Central angle is the angle that has its vertex in the center of the circumference and the sides are radii of it

so

----> by central angle

therefore

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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