The ha theorem is a special case of the
a. sas postulate
b. aas theorem
c. sss postulate
d. asa postulate

HA stands for Hypotenuse Angle theorem.

This is a special case of b. AAS theorem

This is because you would be given a side length ( hypotenuse and an acute angle). and since we would already know that a right triangle has a right angle, so we would have 2 angles and a side = AAS.

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step-by-step explanation:

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.