Which construction uses the compass for only one step in addition to drawing the circle itself?
a. an equilateral triangle inscribed in a circle
b. a square inscribed in a circle
c. a regular hexagon inscribed in a circle
d. a diameter of a circle

Option D is correct.

Step-by-step explanation:

Given the constriction we have to choose the construction which uses the compass for only one step in addition to drawing the circle itself.

Option A: an equilateral triangle inscribed in a circle

Above construction uses three steps in addition to drawing the circle itself as equilateral triangle has 3 sides.

∴ not a correct option

Option B:  a square inscribed in a circle

Above construction uses 4 steps in addition to drawing the circle itself as square has 4 sides.

∴ not a correct option

Option C: a regular hexagon inscribed in a circle

Above construction uses 6 steps in addition to drawing the circle itself as regular hexagon  has 6 sides.

∴ not a correct option

Option D: a diameter of a circle

Above construction uses one step in addition to drawing the circle itself  

which is the correct option.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest

good luck on your studies! : )

david edward.