Difference between B (area of the base) and b (length of the base) as given on GED formula sheet Volume in real life (pool, air in a balloon, concrete) Volume always in cubic units and units must match
Finding missing dimensions given the volume.Calculating volumes of different solids.Formulas and where they come from (Volume is the area of the base (B) times the height).Key words (fill, capacity, space, hold).Show where formula for surface area of rectangular prism and cube comes from - perhaps derive it Difference between area and surface area Surface area is like the area of a 3 dimensional object Finding missing dimensions given surface area.Key words (material, wrapping paper, cardboard for a box).What is surface area? (square units) - sum of the area of all the sides of a solid.Surface area of 3-dimensional shapes/solids Able to identify the above given shapes in the world around you Sphere - only measurement needed is radius or diameter -ball, orb, marble Square pyramid - the base is a square so the sides of the base are equalĦ. Cone - Height and radius, examples of cones - ice cream cone, party hats, tee peesĥ. Cylinder - height and radius, examples of cylinders - soup can, pipe, tubeĤ. Triangular tube, hexagonal tube (have a handout with pictures perhaps or an actual triangular tube)ģ. A right prism is any polygon bases with sides perpendicular to that baseĪ. Rectangular prism (fancy word for a box) and cubeġ.Identification and properties of 3-dimensional shapes/solids Bring out formula sheet for ged and start going over it Download: Area_of_common_figures.pdfĭownload: circles_radius_diameter_from_area_0061_Y1dv3tu.pdf Real life area problems such as cost of carpeting or painting a room Area is always in square units and the units must match (inches and inches) Circle within a circle (mirror with wood frame/ tablecloth hanging down) Rectangle or square within a rectangle (picture frame for example)ī. Area of compound shapes (subtracting areas)Ī. Finding area of two different shapes (basketball court)ħ. Finding area of an L shaped object where you have to draw in rectanglesģ. Area word problems where the word area is not usedĦ. Simple area problems (finding area given dimensions)ĥ. Cannot multiply feet by yards etc, convert before you do calculationġ. Finding area with different units (introduces conversions) Cover, square units, paint, carpet, tile, glassģ. Define what height is (always perpendicular to base) Pythagorean in life - ladder leaning against a building, handicap ramp, construction have students try to make a triangle with a two 2 inch sticks and a 4 inch stick. do not get bogged down in the formula - two sides of a triangle NEVER add up to the third side. Knowing the difference between leg and hypotenuse Shortest side corresponds to lowest angle. perimeter is always a unit of length Download: perimeter.pdfĭownload: circles_radius_diameter_from_circumference_0041_lZyAfGY.pdfġ. no need for formula! Perimeter always involves addition (exception of circle) real life examples of perimeter - laps, interior design,
Perimeter problems where the word perimeter is not used Finding length of a side given the perimeterĥ. Convert to same units before you add (1’ + 1” in does not equal 2’)ī. Finding perimeter with lengths given in different unitsī. distance around, revolution (circle), laps, enclose, surround, outline, encircle, borderģ. Fancy word for perimeter of a circle is circumference
0 kommentar(er)
