Given the following three sequences:
1. 2, 4, 6, 8, 10.
II. 2, 4, 8, 16, 32.
III. a, a + 2, a + 4, a + 6, a + 8..
Which ones are arithmetic sequences?

Options one and three

Step-by-step explanation:

A arithmetic sequence is a sequence of numbers or letters that increase or decrease the same amount. In this case options "one and three" are arithmetic sequences because the amount they increase by stays the same while in option two the increase goes from 2 to 8. To find a arithmetic sequence just find the rule of the set of numbers and if the numbers increase or decrease stays the same then it's  a arithmetic sequence.

Hope this helps.

answer: 3.26019516

step-by-step explanation:

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh