1) a garden has 2 pairs of congruent sides. the sides are not adjacent, and the angles are not all congruent. what is the shape of the garden
2) a poster advertising an art show has 1 pair of parallel sides. all the angles are different, and none of the sides are congruent. what is the shape of the poster?
3) in a math report, ming said that since a rhombus has 4 equal sides and a square has 4 equal sides, all rhombi are squares. is she correct? explain.
i need !

, 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