Which of the following segment is a diameter of o

AB is diameter of circle.

D is correct.

Step-by-step explanation:

We are given a circle whose center is O

We need to choose segment of diameter.

Diameter: It is longest chord of the circle which passes through the center of circle.

In the given figure only segment passes through center.

AB and DE

Thus, Both AB and DE should be diameter of given circle.

Now, we will choose correct option.

Option A: DB is chord of circle.  False

Option B: AC is chord of circle. False

Option C: OD is radius of circle. False

Option D: AB is diameter of circle. True

Hence, AB is diameter of circle.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

the answer on e2020 was d.