Which of the following could represent the scale factor of the smaller figure to the larger figure?

4:25
6pi:15pi
8:125
20pi:125pi
16pi:250pi
2:5

It could be 2:5 or 6pi:15pi

Step-by-step explanation:

If you write the ratio of the surface area as a fraction, you would get . Simplifying it would leave . But this is NOT the answer because that is the ratio of the surface area. You have to square root it to find the scale factor. The square root is . The answers would be 2:5 and 6pi:15pi.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.