# Two roads meet at an angle of 600

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de 2. Jota de sphere has a radius of 9 feet which is changing. Write formulas for Two roads meet at an angle of 60% man starts from the intersection at 1 PM and per minute when the beam makes an angle of with the shore line? *xample 2) A rectangle is 10 inches by L inches whose sides are changing. Write formulas .. *xample M) Two cars are riding on roads that meet at a 60 angle. Find the remaining side and angles. 2. In the right triangle ABC, a = and The base of a pyramid is square with sides ft long, and the height of the pyramid is A basic curve connecting two straight sections of road is often circular. where the two straight sections of highway leading into the curve would meet.

Keeping the density of roads to an economical minimum has initial cost advantages and future advantages in road maintenance costs and the acreage of land taken out of production. Sediment control design criteria may be the same as, or parallel to, other design criteria which will result in an efficient, economical road system. Examples of overlap or parallel criteria are: Relating road location and design to total forest resource, including short and long term harvest patterns, reforestation, fire prevention, fish and wildlife propagation, rural homestead development, and rangeland management.

Relating road location and design to current and future timber harvesting methods. Preparing road plans and specifications to the level of detail appropriate and necessary to convey to the road builder, whether timber purchaser or independent contractor, the scope of the project, and thus allow for proper preparation of construction plans and procedures, time schedules, and cost estimates.

Writing instructions and completing companion design decisions so as to minimize the opportunity for "changed conditions" during construction with consequent costs in money and time. Analyzing specific road elements for "up-front" cost versus annual maintenance cost for instance, culvert and embankment repair versus bridge installation, ditch pavement or lining versus ditches in natural soil, paved or lined culverts versus unlined culverts, sediment trapping devices "trash racks", catch basins, or sumps versus culvert cleaning costs, retaining walls or endhauling sidecast versus placing and maintaining large embankments and fill slopes, roadway ballast or surfacing versus maintenance of dirt surfaces, and balanced earthwork quantities versus waste and borrow.

The route planning phase is the time to evaluate environmental and economic tradeoffs and should set the stage for the remainder of the road development process.

Although inclusion of design criteria for sediment control may increase initial capital outlay, it does not necessarily increase total annual cost over the life of the road which might come from reductions in annual maintenance, reconstruction, and repair costs see Section 2. If an objective analysis by qualified individuals indicates serious erosional problems, then reduction of erosional impacts should be a primary concern.

In some areas, this may dictate the location of control points or may in fact eliminate certain areas from consideration for road construction as a result of unfavorable social or environmental costs associated with developing the area for economic purposes. These include resource management objectives, environmental constraints, safety, physical environmental factors such as topography, climate, and soilstraffic requirements, and traffic service levels.

Objectives should be established for each road and may be expressed in terms of the area and resources to be served, environmental concerns to be addressed, amount and types of traffic to be expected, life of the facility and functional classification. Additional objectives may also be defined concerning specific needs or problems identified in the planning stage. Why is the road being built; what is the purpose of the road i. Physical and environmental factors: What are the topographic, climatic, soil and vegetation characteristics of the area?

Are there environmental constraints; are there social-political constraints? Examples of the former include erosiveness of soils, difficult geologic conditions, high rainfall intensities.

Examples of the latter include land ownership boundaries, state of the local economy, and public opinion about a given project.

### Section – Solving Right Triangle Trigonometry

Average daily traffic ADT should be estimated for different user groups. For example, a road can have mixed traffic--log or cattle trucks and community traffic. An estimate of traffic requirements in relation to use as well as changes over time should be evaluated. This defines the type of traffic that will make use of the road network and its characteristics.

Table 3 lists descriptions of four different levels of traffic service for forest roads. Each level describes the traffic characteristics which are significant in the selection of design criteria and describe the operating conditions for the road. Each level also reflects a number of factors, such as speed,travel time,traffic interruptions, freedom to maneuver, safety, driver comfort, convenience, and operating cost. Find a, b, and B. Find x, the distance from A to B.

Find that the angle of depression to his starting point is How high off of the ground is he? From a second point, 50 feet back, the angle of elevation to the top of the tree is Find the height of the tree to the nearest foot. The notation used to designate the bearing of a line begins with N for north or S for southfollowed by the number of degrees in the angle, and ends with E for east or W for west.

How many miles north and how many miles east have the boat traveled? After landing, the pilot radios his position to a pair of radar station located 25 miles apart along a straight road running north and south. After doing a few trigonometric calculations, one of the stations instructs the pilot to walk due west for 3. Is this information correct? Find the remaining side and angles. Find h as indicated in the figure. The distance from A to D is 32 feet.

Use the information in figure to solve x, the distance between D and C. A plane flies 1. It then turns and flies 9.

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How far is the plane from its starting point? The shadow of a vertical tower is Find the height of the tower. The base of a pyramid is square with sides ft long, and the height of the pyramid is ft.

Find the angle of elevation of the edge indicated in the figure to two significant digits. The base of the triangle in the figure is half the diagonal of the square base of the pyramid. If a foot flagpole casts a shadow 51 feet long, what is the angle of elevation of the sun to the nearest tenth of a degree? Suppose each edge of the cube is 3. Find the measure of the angle formed by diagonals DE and DG.

Round your answer to the nearest tenth of a degree. A second person standing How far is the person at A from the base of the antenna? Find the height of the pyramid. Find the minimum distance, x, that a plant needing full sun can be placed from a fence 4.

Find the distance between the two ships after 2 hrs.

Radar stations A and B are on the east-west line, 3. Find the distance from A to C. Suppose the figure below is exaggerated diagram of a plane flying above the earth. If the plane is 4.

What is the measure of angle A? The Ferry wheel has a feet diameter and 14 feet above the ground. The length of the shadow of a building Find the angle of the elevation of the sun. If Arroyo Grande is 4. A plane flying at mph takes 2. From a window