What is the sum of the interior angles of a nonagon?

900°

1620°

1440°

1260°

D) 1260°

Step-by-step explanation:

Total angle: (n - 2) × 180

Nonagon has 9 sides, so n = 9

(9 - 2) × 180 = 1260

1260°

Step-by-step explanation:

Formula for this question:

(n - 2) × 180

n is the number of sides.

In a nonagon, there are 9 sides (nona).

So,

((9 - 2) × 180)

(7 × 180)

1260

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

d

step-by-step explanation:

i used the pitagoras theoreme