Mathematics, 30.05.2020 06:59 brooke012002

Hi,
I need to use this formula(below) to find the answers of these 4 questions. I found the answers but I need help to use the formula below:
Find the measure of one base angle.
central angle = 360/9 = 40
2 * side angle + central angle = 180
2 * side angle + 40 = 180
2 * side angle = 140
side angle = 70°

Use a trig ratio to find the height of one triangle.
tan(70°) = h/(8/2)
h = 4tan(70°)
h = 10.99 in

Use A = 1/2 bh to find the area of one triangle.
A = 1/2 (8)(10.99)
A = 43.96 in2

Find the area of the entire polygon.
A = 43.969
A = 395.64 in2
The Questions:
1. An equilateral triangle with a side of 1 inch
3. A regular pentagon with a side of 3 centimeters
4. A regular hexagon with a side of 10 cm
5. A regular heptagon with a side of 7 inches.

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 13:00, danielle413

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

Answers: 3

continue

Mathematics, 21.06.2019 21:40, calebhoover03

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000

Answers: 2

continue

Mathematics, 21.06.2019 23:00, LillianMRucker

Atriangle in the coordinates of (2,3), (-4,5) and (-2,4) it is translated 3 units down. what are it’s new coordinates

Answers: 1

continue

Mathematics, 22.06.2019 01:00, hlannette7005

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?

Answers: 2

continue

You know the right answer?

Hi,
I need to use this formula(below) to find the answers of these 4 questions. I found the an...