Lines Angles Identification Worksheet
Grade 4 Mathematics • TEKS 4.6A & 4.6B
Lines, Rays & Relationships
Name:
Date:
Teacher:
Score:
TEKS 4.6A Terms: Point (exact spot) • Line (both directions) • Line Segment (two endpoints) • Ray (one endpoint)
Part I
1
Identify Basic Geometric Figures
Label: Point, Line, Line Segment, or Ray
P
Figure 1
A B
Figure 2
C D
Figure 3
E F
Figure 4
2
Identify Line Relationships (TEKS 4.6B)
Label: Parallel, Perpendicular, or Intersecting
Picture A: Never Cross
Type:
Picture B: Square Corner (\(90^\circ\))
Type:
Picture C: Cross (Not \(90^\circ\))
Type:
3
Town Map Detective: Find the Lines
Use the map picture to answer
Elm Street Oak Street Pine Ave River Rd
a. Parallel Streets: Name two streets that run parallel:
and
b. Perpendicular Streets: Name a street forming a right angle with Elm St:
Elm Street is perpendicular to:
c. Intersecting Road: Which slanted road crosses Oak Street?
Slanted road:
4
Draw and Label (TEKS 4.6A)
Sketch cleanly with a straightedge
A. Draw ray \(\vec{JK}\) starting at endpoint \(J\) through \(K\).
B. Draw two perpendicular lines with a square right-angle mark.
C. Draw two parallel line segments. Label endpoints \(A, B\) & \(C, D\).
Page 1 of 2: Points, Lines, Segments, Rays & Relationships Turn over for Acute, Right & Obtuse Angles →
Grade 4 Mathematics • TEKS 4.6A & 4.6C
Acute, Right & Obtuse Angles
Student Name:
Acute Angle Open less than a right angle (< \(90^\circ\))
Right Angle Forms a square corner (\(= 90^\circ\) \(\llcorner\))
Obtuse Angle Open wider than a right angle (> \(90^\circ\))
5
Angle Gallery: Classify Each Picture
Write: Acute, Right, or Obtuse
Angle 1
Type:
Angle 2
Type:
Angle 3
Type:
Angle 4
Type:
Angle 5
Type:
Angle 6
Type:
6
Angles in Everyday Objects & Shapes
Classify the highlighted angle
Open Scissors
Angle:
Clock at 3:00
Angle:
Beach Chair Back
Angle:
R
Corner of Triangle
Angle R:
Roof Peak
Peak:
Open Bird Beak
Angle:
7
Review Challenge: Math Detective Reasoning
Critical Thinking
Misconception Detective:
Marcus looks at two lines that cross each other and says: "These lines are parallel because they touch." Explain Marcus's mistake and give the correct term:
The Index Card Corner Tool:
You place the square corner of an index card (\(90^\circ\)) over an angle. The angle's ray hides completely under the card. Is the angle acute or obtuse? Explain:
Quick Check (TEKS 4.6A): Write Acute, Right, or Obtuse
Corner of a book →
Partially open door (\(35^\circ\)) →
Wide open fan (\(120^\circ\)) →
Page 2 of 2: Acute, Right & Obtuse Angles (TEKS 4.6A, 4.6C) Grade 4 Geometry TEKS Complete!
Lines Angles Task Cards
Cut along dashed lines to separate cards Set 1: Basic Figures (Cards 1–4) • Grade 4 TEKS 4.6A
CARD 1 TEKS 4.6A • Basic Figures
M
Which geometric term describes an exact location in space represented by a dot, as shown above?
A. Line
B. Point
C. Ray
D. Line Segment
CARD 2 TEKS 4.6A • Basic Figures
P Q
Look at Figure PQ. Which term describes a straight path that extends in opposite directions forever?
A. Line Segment
B. Ray
C. Line
D. Point
CARD 3 TEKS 4.6A • Basic Figures
S T
A part of a line with two definite endpoints and a measurable length is called a —
A. Ray
B. Line Segment
C. Parallel Line
D. Point
CARD 4 TEKS 4.6A • Basic Figures
J K
Figure JK begins at endpoint J and continues in one direction without ending. What is Figure JK?
A. Line
B. Line Segment
C. Ray
D. Perpendicular Line
Grade 4 Geometry Task Cards • Page 1 of 4 • Record answers on Student Recording Sheet
Cut along dashed lines to separate cards Set 2: Line Relationships (Cards 5–8) • Grade 4 TEKS 4.6B
CARD 5 TEKS 4.6B • Line Relationships
Lines in the same plane that stay the exact same distance apart and never touch or intersect are —
A. Perpendicular Lines
B. Parallel Lines
C. Intersecting Lines
D. Rays
CARD 6 TEKS 4.6B • Line Relationships
Two lines that cross or intersect to form exact \(90^\circ\) square right angles are called —
A. Parallel Lines
B. Perpendicular Lines
C. Line Segments
D. Rays
CARD 7 TEKS 4.6B • Line Relationships
Look at the picture. The two lines cross at point X, but do NOT form square corners. These are —
A. Parallel Lines
B. Perpendicular Lines
C. Intersecting Lines
D. Rays
CARD 8 TEKS 4.6B • Real-World Lines
Maple Ave Main St
Maple Avenue and Main Street meet at a square right-angle corner. How are these two streets related?
A. They are parallel.
B. They are perpendicular.
C. They never intersect.
D. They are rays.
Grade 4 Geometry Task Cards • Page 2 of 4 • Record answers on Student Recording Sheet
Cut along dashed lines to separate cards Set 3: Types of Angles (Cards 9–12) • Grade 4 TEKS 4.6A & 4.6C
CARD 9 TEKS 4.6A • Types of Angles
An angle that opens smaller than a square right angle (less than \(90^\circ\)) is classified as —
A. An Acute Angle
B. A Right Angle
C. An Obtuse Angle
D. A Straight Angle
CARD 10 TEKS 4.6A • Types of Angles
An angle that forms a perfect square corner measuring exactly \(90^\circ\) is classified as —
A. An Acute Angle
B. A Right Angle
C. An Obtuse Angle
D. A Ray
CARD 11 TEKS 4.6A • Types of Angles
An angle that is open wider than a right angle (greater than \(90^\circ\)) is classified as —
A. An Acute Angle
B. A Right Angle
C. An Obtuse Angle
D. A Line
CARD 12 TEKS 4.6C • Angles in Shapes
X Y Z
Look at Triangle XYZ. Angle Z at the top is open wider than a square corner. Angle Z is —
A. An Acute Angle
B. A Right Angle
C. An Obtuse Angle
D. Parallel
Grade 4 Geometry Task Cards • Page 3 of 4 • Record answers on Student Recording Sheet
Grade 4 Mathematics • TEKS 4.6A & 4.6B
Geometry Task Cards Recording Sheet
Name:
Date:
Class:
Score:
Directions: Record your answer letter and term for each card. Write a short reason for each card. 12 Cards Total
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Reflection 1: Line Relationships (TEKS 4.6B)
Explain how you can tell the difference between perpendicular lines and lines that are simply intersecting:
Reflection 2: Angle Classification (TEKS 4.6C)
Draw an obtuse angle below. Explain how you used a square corner (\(90^\circ\)) benchmark to prove it is obtuse:
Teacher / Student Quick-Check Answer Key: Self-Scoring / Peer Review
1: B (Point)
2: C (Line)
3: B (Segment)
4: C (Ray)
5: B (Parallel)
6: B (Perpendicular)
7: C (Intersecting)
8: B (Perpendicular)
9: A (Acute)
10: B (Right)
11: C (Obtuse)
12: C (Obtuse)
Page 4 of 4: Student Response & Justification Sheet Turn in with task card set!
