geoboards
DESCRIPTION
Geoboards. Review of Algebra. y. x. (0,0). Review. What is the slope of the line that passes through: (2, -3) and (-4, 3)?. y. x. (0,0). Review. Graph the following line on your Geoboard:. Review Plus. y. Connect (-3,-2) and (3,2) - PowerPoint PPT PresentationTRANSCRIPT
Review Plus
Connect (-3,-2) and (3,2) What is the slope of
the line that connects these points?
Connect (-2,2) and (2,-4) What is the slope of
the line that connects these points?
(0,0) x
y
Review Plus
Connect (-3,-2) and (3,2) What is the slope of the
line that connects these points?
Connect (-4,-1) and (2,3) What is the slope of the
line that connects these points?
(0,0) x
y
Parallel Lines
Graph y=1 and y=3 Graph transversal
line through (-2,3) and (1,0)
Measure the angles(0,0) x
y
Parallel Lines
Connect (-3,-2) and (3,2)
Connect (-4,-1) and (2,3)
Create a transversal (-4,2) and (3,-3)
What angles are congruent?
(0,0) x
y
Transformations
Draw triangle RST and reflect it over the y-axis. R(-5,0) S(-2,-5) T(-1,-1)
(0,0) x
y
Transformations
Draw triangle RST and reflect it over the x-axis. R(-5,0) S(-2,-5) T(-1,-1)
(0,0) x
y
Transformations
Draw triangle RST and rotate it 90° clockwise. R(-5,0) S(-2,-5) T(-1,-1)
Can use graph paper too
(0,0) x
y
Triangles
B
Find three locations for a point P, above segment AB, so that triangle APB is a right triangle.
A
Triangles
B
Find three locations for a point P, above segment AB, so that triangle APB is an isosceles triangle.
A
Triangles
B
Find three locations for a point P, above segment AB, so that triangle APB is an acute triangle.
A
Triangles
B
Find three locations for a point P, above segment AB, so that triangle APB is an obtuse angle.
A
Area of triangles
Determine the area of this triangle as many ways as you can--- discuss
How efficient was your approach?
Would you approach it differently now?
Area of quadrilaterals
Determine the area of this polygon.
Does your method from the triangle work for this polygon?
Area of quadrilaterals
Determine the area of this polygon.
Does your method from the triangle work for this polygon?
Area of quadrilaterals
Create these trapezoids on your Geoboard.
Prove the formula for determining the area of a trapezoid
2
)( 21 hbb
Geoboards and Tangrams
Use your Geoboard and bands to form a special geometric shape following the steps below.
1. Band together: (0,0) (0,8) (8,8) and (8,0)2. Band together: (0,8) and (8,0)3. Band together: (0,4) and (4,0)4. Band together: (2,2) and (8,8)5. Band together: (2,2) and (2,6)6. Band together: (6,2) and (4,0)