I need help with Geometry

COB and AOD

Step-by-step explanation:

Reminder: vertical angles are pairs of opposite angles that is made from intersecting 2 line/line segment.

In this case, to find pairs of opposite angles, you would look at angles that share a center but do not share a line segment.

If you check all of these, it's clear that COB and AOD is the only valid answer.

vhhhbnbb. ddben jenner v

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm