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Date Assigned: |
In Class: |
Assignment: |
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1/30 |
Do Now: Hand out homework
recording sheets.
Go over Midterm.
Start HW. |
See HW below due Monday. |
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1/31 |
Go over Quiz from 4-6.
Define--in a triangle:
Median
Altitude
Angle bisector
Perpendicular bisector
Start 5-1 WS1 |
5-1 WS1 |
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2/1 |
Go over HW.
Page 243 #15 in class. |
Page 244 #23 - 26. |
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2/2 |
Constructions
| Circles-Locus
of points equidistant from center. |
Try this
helpful link:
CONSTRUCTIONS --Step by Step
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| Angle bisector |
| Perpendicular bisector |
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Geometry Jan regents 2012 WS
#1-37
Castlelearning.com:
Triangle/Line/Angle Pre-Test
Proof/Plane/Logic pre-test
The above worksheets will be due
on Monday. |
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2/3 |
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2/6 |
Put above constructions in a triangle.
Construct bisectors of the angles
of a D.
Describe the point of concurrency as the
INCENTER
and draw
inscribed circle.
Construct perpendicular bisectors
of sides of a D.
Describe the point of concurrency as the
CIRCUMCENTER
and draw
circumscribed circle. |
ORTHOCENTER:
1. Draw
triangle ABC with
A(7,11), B(4,0), C(-8,8).
2.
Find the slope of each side. Then
find the slope of the line that is
perpendicular to each side.
3.
Draw a line through each side of the
triangle that is perpendicular to that
side and goes through the opposite
vertex.
4.
Find the point of concurrency.
--Due Wednesday. |
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2/7 |
CENTROID: Draw 3 medians of a triangle
on piece of graph paper--page
245 #35-38:
1. Draw
triangle ABC with A(16,8), B(2,4), and
C(-6,12).
2.
Find the midpoint of side AB.
3.
Draw a line from the midpoint to the
opposite vertex, C. This is the
median.
4.
Repeat this step for the other sides.
5.
Find the point of concurrency of the
medians. Label it
Centroid.
6.
Find the distance from the Centroid to
side AB. Then find the distance
from the Centroid to the vertex C.
Write your answers in simplest radial
form.
7.
Repeat the above steps for the other two
medians.
8.
Determine the relationship between the
two segments of each median. |
See Above
Assignment. |
|
2/8 |
Hand in HW from Orthocenter and
Centroid.
Start page 244
#27-30. |
Finish
page 244 #27-30 for HW. |
|
2/9 |
Collect HW.
Draw a triangle with angles 40, 30.
Measure each side. Put angles in
order from smallest to biggest. Then
put sides in order.
Introduce triangle inequalities--page 251
#10-12, 13-15. REDRAW the pix. Put
appropriate numbers under the side/angle! |
Page 252 #29-34, 37-42. |
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2/10 |
Go over HW in detail.
Show Exterior Angle Inequality--the exterior
angle of a triangle is greater than either
of the two remote interior angles.
Page 251 #4-7.
Page 252 #17-28. |
Castlelearning Review WS. |
|
TBA |
Triangle Side Inequality:
Difference<Third
side of
D<Sum
page 264 #4 - 7. |
|
|
TBA |
Review 5-1
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Points INSIDE
the D's: |
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ALWAYS:
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Only ACUTE
D's: |
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INCENTER
|
ORTHOCENTER |
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CENTROID |
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CIRCUMCENTER |
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