Enter the number that belongs in the green box.

Angle D equals 80 degrees.

Since both triangles and angles are congruent, you can use triangle ABC to find the measure of CDE.

ABC has to equal 180 degrees so that means that 30 + 70 + <B = 180

add: 100 + <B = 180

Subtract <B = 80

Angle B equals 80 degrees which also means that Angle D equals 80 degrees.

what statement? is there an image?

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.