suppose a line that appears parallel to side BC¯¯¯¯¯¯¯¯ of △ABC intersects sides AB¯¯¯¯¯¯¯¯ and AC¯¯¯¯¯¯¯¯ at points X and Y respectively, and AXAB=12. How can you determine if the line is or is not parallel to BC¯¯¯¯¯¯¯¯? Explain.(4 points)

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

i need a picture

step-by-step explanation:

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.