14. find the number of sides of a polygon if the measures of its interior angles have a sum of 10,440°.

a. 116
b. 58
c. 60
d. 114

C. 60

Step-by-step explanation:

Use this formula to find any sides

(Sum of all interior angles in a polygon) /(180)+2= (number of sides)

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it