Lesson 9 Homework 4
NYS COMMON CORE MATHEMATICS CURRICULUM
Name
Date
Sketch two different ways to compose the given angles using two or more pattern blocks.
Write an addition sentence to show how you composed the given angle.
1. 𝐴𝐵𝐶 is a straight line.
A
B
C
180° = __________________________________
A
B
C
180° = __________________________________
2. ∠𝐷𝐸𝐹 = 90°
D
D
F
E
90° = __________________________________
Lesson 9
Date:
© 2012 Common Core, Inc. Some rights reserved. commoncore.org
E
F
90° = __________________________________
Decompose angles using pattern blocks.
10/16/13
4.C.13
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Lesson 9 Homework 4
NYS COMMON CORE MATHEMATICS CURRICULUM
3. ∠𝐺𝐻𝐼 = 120°
G
G
H
I
H
120° = __________________________________
I
120° = __________________________________
L
L
4. 𝑥° = 270°
J
J
K
K
𝑥°
𝑥°
270° = __________________________________
270° = __________________________________
5. Micah built the following shape with his pattern blocks. Write an addition sentence for each angle
indicated by an arc and solve. The first one is done for you as an example.
G
H
a. 𝑦° = 120° + 90°
𝑧°
𝑦° = 210°
F
I
E
𝑥°
J
𝑧° = __________
D
𝑦°
K
b. 𝑧° = ______________________
C
B
c. 𝑥° = ______________________
𝑥° = __________
A
Lesson 9
Date:
© 2012 Common Core, Inc. Some rights reserved. commoncore.org
Decompose angles using pattern blocks.
10/16/13
4.C.14
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.