I need help with this. Lesson 5.2· Exterior Angles of a PolygonNamePeriodDate1. How many sides does a regular polygonhave if each exterior angle measures 30°?30 8602. How many sides does a polygon have if thesum of the measures of the interior anglesis 3960°? 39606n-2)18sn=1212Siclesg960s 1on-360+ S6024zn3. If the sum of the measures of the interiorangles of a polygon equals the sum of themeasures of its exterior angles, how manysides does it have? (n-2)1 360n4. If the sum of the measures of the interiorangles of a polygon is twice the sum of itsexterior angles, how many sides does ithave?lon-360 = 360In Exercises 5-7, find each lettered angle measure.5. a =6. a =b.7. а —156b =132C =116829.134°72°8. Find each lettered angle measure.150°aC =9. Construct an equiangular quadrilateral that is not regular.CHAPTER 539Discovering Geometry Practice Your Skills02015 Kendall Hunt Publishing Lesson 5.1• Polygon Sum ConjectureNamePerlodDateIn Excrcises 1 and 2, find each lettered angle measure,1. a = l03, b = 102.c2. a =d= 83d =0-GマBorespording180-26a154L54/22773. One exterior angle of a regular polygon measures 10°. What isthe measure of cach interior angle? How many sides does thepolygon have?4. The sum of the measures of the interior angles of a regular polygon is2340°. How many sides does the polygon have?5. ABCD is a square. ABE is an equilateraltriangle.6. ABCDE is a regular pentagon. ABFGis a square.x =7. Use a protractor to draw pentagon ABCDE with mLA = 85°,mZB = 125°, mLC = 110°, and mLD = 70°. What is mLE?Measure it, and check your work by calculating.Discovering Geometry Practice Your Ski02015 Kendall Hunt Publish38CHAPTER 5

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Answered: Lesson 5.2· Exterior Angles of a…

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

ChapterP: Preliminary Concepts

SectionP.CT: Test

Problem 1CT

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You are thinking of making your home more energy efficient by replacing some of the light bulbs with compact fluorescent bulbs and insulating part or all of your exterior walls. Each compact fluorescent light bulb costs $4 and saves you an average of $2 per year in energy costs, and each square foot of wall insulation costs $1 and saves you an average of $0.20 per year in energy costs.† Your home has 50 light fittings and 1,200 square feet of uninsulated exterior wall. You can spend no more than $1,300 and would like to save as much per year in energy costs as possible. How many compact fluorescent light bulbs and how many square feet of insulation should you purchase? (If an answer does not exist, enter DNE.) compact fluorescent light bulbs bulbs insulation sq ft How much will you save in energy costs per year?

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