EOC Strategy - GEOMETRY Coordinate geometry. STRATEGY #1 –USE A GRAPH If there are coordinates...
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Transcript of EOC Strategy - GEOMETRY Coordinate geometry. STRATEGY #1 –USE A GRAPH If there are coordinates...
EOC Strategy - GEOMETRYCoordinate geometry
STRATEGY #1 –USE A GRAPH
If there are coordinates given in a problem
-GRAPH THEM
-LABEL THEM
MARK THE QUESTION
eye ball it
EXAMPLE G1.1
Describe the quadrilateral
ABCD with vertices a(7,8)
B(9,10) C(7, 12) D(5,10).
STRATEGY #2 – LOOK FOR KEY WORDS in combination with coordinates
DISTANCE FORMULA
“how far?” Length perimeter
MIDPOINT FORMULA Halfway Bisect Middle Center of circle
Will we use distance or midpoint?Do not solve!
Triangle RST has vertices at R(7, 4), S(12, 12), and T(2, 12). What is the approximate perimeter of triangle RST?
The center of a circle is located at (0, 4). The endpoint, X, of one of the circle’s radii is ( 4, 5). Segment XY is a diameter of the circle. Where is point Y located?
EXAMPLE G1.2Use both strategies: graph & key words Triangle RST has
vertices at R(3, 4), S(8, 8), and T(2, 0). What is the approximate perimeter of triangle RST?
EXAMPLE G1.3Use both strategies: graph & key words The center of a circle is
located at (0, 4). The endpoint, X, of one of the circle’s radii is ( -4, 5). Segment XY is a diameter of the circle. Where is point Y located?
CHECK IT G1.4
The coordinates of the vertices of a square are (-1, 0),
(1, -1), (0, -3), and (-2, -2). What is the area of the square?
CHECK IT G1.5
A map of the school is drawn on a coordinate grid. The front office is located at ( -2, 3) and math class is located at ( -8, -2). The water fountain is located halfway between the front office and math class. Where is the drinking fountain located on the map?
Check it G1.6
Triangle LMN has the vertices (1, 6), (6, 3), and (5, 7). What type of triangle is Triangle LMN?
A. equilateral triangle
B. isosceles triangle
C. scalene triangle
D. obtuse triangle