Geometry for the Landscape Adapted from: Chapter 2 Math for Horticulture by Mary Ann Boor From foukeffa.org Written by Cara Hutchins Kowal GA Ag Ed Curriculum.

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Presentation transcript:

Geometry for the Landscape Adapted from: Chapter 2 Math for Horticulture by Mary Ann Boor From foukeffa.org Written by Cara Hutchins Kowal GA Ag Ed Curriculum Office To accompany the Georgia Agriculture Education Curriculum Course Unit 4 July 2001

Objectives By the end of this lesson you will be able to calculate: –the perimeter of a given section of land –the area of given section of land –the volume of container

Terms diameter (d)- the line that divides a circle into two equal parts radius ( r)- one half the diameter pi (  ) or 22/7 height- line segment that shows how tall a triangle is. It is always drawn from a corner of the triangle to the opposite side forming a 90 degree angle.

Terms continued perimeter(P)- the distance around –the sum of all sides –How much fence do you need to go around a yard? Circumference (C)- perimeter of a circle –C= diameter X  –How much edging do you need to go around a flower bed?

Terms Continued volume (V)- how much fits in a given space –Volume of a box= area of bottom X height –Volume of a sphere+ 4/3 X pi X radius X radius X radius –How much soil do you need to fill a flower pot?

More Terms area (A)- the space inside the perimeter –rectangle= side X side –triangle= (base X height)/2 –circle= radius X radius X  –How many square feet of sod do you need to order to cover the yard?

Example of perimeter

Examples of area rectangle

Examples of area circle

Examples of Area of Triangle

Volume

Notes If a shape is not standard, break it down into smaller standard shapes to make calculations Calculations must be done in the same unit of measurement (change feet to inches or vice versa as needed) Simplify all answers, do not write feet as decimals, convert to inches.

Units Perimeter- feet, inches, cm, m, mm, yards……. Area- sq. feet, sq. inches, sq. cm, sq. yards…... Volume- cubic feet, cubic inches, cubic cm, cubic yards…….

Homework problems 1.How many cubic feet of mulch do you need to buy if you are mulching a 3 foot ring three inches deep around 4 trees that are 1 foot each in diameter? 2. How much soil is needed to fill 24 planters that are 1 ft wide, 6 feet long, and 1ft 6 inches deep?

3. Find the perimeter of the yard to the right. 4. How many sq. feet of sod would be needed to cover the yard at the right? 38’ 72’

5. If three inches of snow had to be removed from a walk pictured below, how many cubic ft. of snow would be removed? 50’ 46’ 12’ 8’