bell ringer on lesson 1-1 - 6 questions in your notes, then do p. 11-12 53, 58, 61 and 63
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Bell Ringer on Lesson 1-1 - 6 questions In your notes, then do p. 11-12 53, 58, 61 and 63. Watch Video - Describing What You see. Content Standards - PowerPoint PPT PresentationTRANSCRIPT
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Bell Ringer on Lesson 1-1 - 6 questions
In your notes, then do
p. 11-12 53, 58, 61 and 63
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• Watch Video - Describing What You see.
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Content Standards
G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
G.CO.12 Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.).
Mathematical Practices
6 Attend to precision.
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You identified and modeled points, lines, and planes.
Measure segments using equations and calculate with measures with a 90% accuracy.
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• line segment
• betweenness of points
• between
• congruent segments
• construction
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Length in Metric Units
B. Find the length of AB using the ruler.
Each centimeter is divided into fourths.
Point B is closer to the 4.5 cm mark.
Answer: AB is about 4.5 centimeters long.
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Length in Standard Units
B.
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A.
A.
B.
C.
D.
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Find Measurements by Adding
Find XZ. Assume that the figure is not drawn to scale.
XZ is the measure of XZ. Point Y is between X and Z. XZ can be found by adding XY and YZ.
___
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Find Measurements by Adding
Add.
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Find BD. Assume that the figure is not drawn to scale.
B
C
D
16.8 mm
50.4 mm
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• 3 minutes• Individual Practice p. 18 – 20 1, 2, 13, 15,
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Find Measurements by Subtracting
Find LM. Assume that the figure is not drawn to scale.
Point M is between L and N.
LM + MN = LNBetweenness of points
LM + 2.6 = 4Substitution
LM + 2.6 – 2.6 = 4 – 2.6 Subtract 2.6 from each side.
LM = 1.4 Simplify.
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Find TU. Assume that the figure is not drawn to scale.
TU
V3 in
A.
B.
C.
D.
in.
in.
in.
in.
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Write and Solve Equations to Find Measurements
ALGEBRA Find the value of x and ST if T is between S and U, ST = 7x, SU = 45, and TU = 5x – 3.
ST + TU = SU Betweenness of points
7x + 5x – 3 = 45 Substitute known values.
7x + 5x – 3 + 3 = 45 + 3 Add 3 to each side.
12x = 48 Simplify.
Draw a figure to represent this situation.
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Write and Solve Equations to Find Measurements
x = 4 Simplify.
ST = 7x Given
= 7(4) x = 4
= 28 Multiply.
Answer: x = 4, ST = 28
Now find ST.
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ALGEBRA Find the value of n and WX if W is between X and Y, WX = 6n – 10, XY = 17, and WY = 3n.
Draw a diagram first.
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• 5 minutes• Individual Practice
page 18 – 20 Do 21, 23, 25
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Equal vs. Congruent See p. 16 in the margin
Lengths are equal and segments are congruent
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• Class Assignment – in notes (8 minutes)• p. 18 - 21 9, 35, 42, 43
• HW p. 18 – 21 10 – 16 even 22- 28, 33, 46, 48