it is known that the sum of the interior angles of a regular

angie5252022-10-04 11:39:541条回答

it is known that the sum of the interior angles of a regular polygon is at least 90度 greater than that of its exterior angles.Find the least possible number of sides of the polygon
书上answer是5.
还有...要列出不等式啦...

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kittyhty 共回答了18个问题 | 采纳率100%
x>=360+90=450
即x最小是540,所以是5边形
不等式中的360是因为任意多边形,外角和都是360度,90是题目说的
x是内角和
所以内角和大于等于外交和+90度
没有内角和会等于450,最小的是540
而540正是五边形的内角和
所以是五边形
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textile 意思是纺织
interior 意思是内部
lining 意思是衬里
大概就是牛皮内部纺织之类的吧
internal ,interior ,domestic 有什区别
pvrp1年前1
snfxdf2xl6cc5 共回答了25个问题 | 采纳率80%
internal 除有“内部的”意思外,还有“国内的”意思,而且侧重在“国内的”;
interior 只含有“内部的”的意思,此外,它还可以做名词,表“内部”!
英语翻译if part is machined from stock the interior features may
英语翻译
if part is machined from stock the interior features may me notified in order to simplify maching,please seek advisement prior to production
llb03061年前3
lq2008bj 共回答了21个问题 | 采纳率100%
如果零件是由原料直接经机械加工而成的,为了简化加工过程,会告知您原料的内部特征.所以在您选择产品之前,请先留意广告内容.
英语翻译LIGHT RENOVATIONSMany interior upgrades and small renova
英语翻译
LIGHT RENOVATIONS
Many interior upgrades and small renovation projects are not essential
or required.For example,most of the profit for a small town paint store is not from people
painting because they need to paint to protect a structure.most of the profit
is generated from people wanting to change the color or look of a space.
Real-world operations budgets need to include funds for light
renovations of spaces.Sometimes these renovations are driven by efficiency,so
here are some things that can be done to reduce water and energy usage in light
renovations.
-upgrade to a low-flow showerhead or shower system.1.5gallons per
minute is usually the least amount of water you need to use.
-replace the flush valves in water closets with dual-flush valves.
-install a rain barrel or other type of rainwater harvesting system
-enlist a Water Sense-certified contractor to upgrade the irrigation
system.
-install a graywater system to collect water from showers and washing
machines.
-install a continuous energy and water monitor that records and displays
energy and water use in real time.Studies have shown that having such a device
helps reduce energy consumption.
SMART METERS
Smart meters can help reduce energy and water use in existing buildings
and homes.Two types of energy meters are available.One type records the
amount of energy used for a particular amount of time,usually a month.Another
type is a demand meter ,which monitors the amount of energy used during a peak
time,usually within a 15-minute window.It can report the time of day when
demand is the highest.
Let’s look at how that saves energy and water.As stated earlier,peak
demands on the power grid may force utilities to buy power from other systems
or use a less environmentally friendly generation method such as coal.Smart
meters can monitor the power grid to determine when the grid is at peak-load
operations.These meters then communicate with the major appliances in a
building and delay when they turn on to reduce the load on the power grid.
As a plumbing engineer,business owner,or homeowner,you need to learn
about these systems and find ways to reduce energy consumption in your house or
facility.
Develop plans,and know what equipment you will purchase when the time
comes for replacement.Better yet,know the life expectancy of your equipment
and set up a replacement plan and budget before a failure on a holiday weekend
causes a major disaster.
一旧云73741年前3
迷失的水水 共回答了12个问题 | 采纳率100%
轻装修很多的内部更新和小型装修项目都不是急需或至关重要的.比如说,一个小镇中的油漆店,它大部分的获利不是来自那些因需要保护建筑结构而涂漆的人,而是那些想要改变内部空间的颜色或样子的人.现实生活中的运行预算...