

GEO: Unit 1 - Lessons 1.1 and 1.2
Presentation
•
Mathematics
•
10th Grade
•
Medium
+1
Standards-aligned
Grace Silaban
Used 6+ times
FREE Resource
6 Slides • 13 Questions
1
GEO: Unit 1 - Lessons 1.1 and 1.2
~ Identify and describe geometric figures
~ Naming parts of a circle

2
Poll
[POLL]
Are you familiar with the names for GEOMETRIC FIGURES? Select the names of geometric figures that you know.
Point
Line
Line Segment
Ray
Plane
3
Naming Geometric Figures:
Point - named with a capital letter
Line - named using any two points on the line, in any order, with a line symbol drawn above | OR using a lowercase letter
4
Naming Geometric Figures:
Line Segment - named using the two endpoints, in any order, with a segment symbol drawn above
Ray - named using the endpoint and one other point, with a ray symbol drawn above; the endpoint is always listed first
5
Multiple Choice
MULTIPLE CHOICE
Click on the image. Which of the following correctly describes the two geometric figures?
(a) is segment QP and (b) is line CN
(a) is line QP and (b) is segment CN
(a) is ray QP and (b) is line NC
(a) is segment QP and (b) is line N
6
Open Ended
Click on the image.
Caleb says that the figure on the left can be named KJ . Jen says the figure can be named JL . Who is correct? Explain.
7
Multiple Choice
MULTIPLE CHOICE
Click on the image.
Is
SR a possible name for the figure on the left? Select the best answer/explanation.
Yes, that is possible because it uses the ray symbol above the letters
No, to name a ray, list the endpoint first. The endpoint of this ray is R, not S. So it should have been RS .
Yes, it is possible. You can name it SR or RS, the order doesn't matter.
No, to name a ray, simply list the endpoint R. So it looks like this: R
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Naming Geometric Figures:
Plane - named using any three points in the plane that are not on the same line, in any order OR using a capital cursive letter
Angle - SEE THE IMAGE ON THE RIGHT
9
Multiple Select
MULTIPLE SELECT
Click on the image.
Select all correct names for the angle shown on the left.
∠3
∠XZY
∠XYZ
∠ZYX
∠YXZ
10
Multiple Choice
MULTIPLE CHOICE
Click on the image.
How many RAYS can be named in this geometric figure?
1
2
3
There is no ray
11
All about ANGLES! (!! i m p o r t a n t !!)
Acute angle - measured between 0 and 90 degrees
Right angle - measured at exactly 90 degrees
Obtuse angle - measured between 90 and 180 degrees
Straight angle - measured at exactly 180 degrees
Complementary angles - angles that add up to 90 degrees
Supplementary angles - angles that add up to 180 degrees
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Fill in the Blanks
Type answer...
13
Fill in the Blanks
Type answer...
14
About C I R C L E
A chord of a circle is a segment with both endpoints on the circle.
A diameter is a chord that passes through the center of a circle.
A radius is a segment with one endpoint on the circle and one endpoint at the center of the circle.
15
Multiple Choice
MULTIPLE CHOICE:
Click on the image.
Classify the following segment in circle O:
BO
Chord
Radius
Diameter
Center
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Multiple Choice
MULTIPLE CHOICE:
Click on the image.
Classify the following segment in circle O:
AF
Chord
Radius
Diameter
Center
17
Multiple Choice
MULTIPLE CHOICE:
Click on the image.
Classify the following segment in circle O:
EO
Chord
Radius
Diameter
Center
18
Multiple Select
MULTIPLE SELECT:
Click on the image.
Classify the following segment in circle O: (select 2)
CE
Chord
Radius
Diameter
Center
19
Poll
[POLL]
Which topic(s) do you need or prefer to have more practice on? Select all that apply to you.
How to name angles using 3 letters
Complementary and supplementary angles problems
Naming any geometric figures (point, segment, line, plane, ray, etc.)
Circle stuff (radius, chord, diameter, center)
Acute vs Obtuse vs Right vs Straight angles
GEO: Unit 1 - Lessons 1.1 and 1.2
~ Identify and describe geometric figures
~ Naming parts of a circle

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