Which of the following segments is a diameter of
o?
a. de
b. od
c. df
d. oe

The segment DE is a diameter of O.

Step-by-step explanation:

To get the diameter of O.

The diameter of a circle is a straight line segment that passes through the centre of a circle and it end points lie on the circle.

Now, we observe that DE is the segment that pass through the centre point O and its end point lies on the circle.

Therefore, the segment DE is a diameter of O.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -