1. In circle o, radii OA and OB are drawn. Central angle AOB measures 68. The measure of arc AB is
(A) 34 (B) 68 (C) 112 (D) 136

(Please explain if you can, I’d really appreciate you but you don’t have to)

Step-by-step explanation:

A central angle is defined as

Where is the angle that subtends the arc , and is the radius.

So, if the radius is 2 units long, so the measure of the arc AB would be

Which means arc AB measures 136°.

Therefore, the right answer is D.

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.