(picture) sigma notation and the nth term asapp

option-d

Step-by-step explanation:

we are given series as

so, first term is 6

now, we can find common difference

now, we can find kth term

we can plug values

Since, there are four terms

so, k varies from 1 to 4

so, we get series as

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.