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Solve Problems for Unknown Angles

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Lesson Plans and Worksheets for Grade 4
Lesson Plans and Worksheets for all Grades
More Lessons for Grade 4
Common Core For Grade 4



Videos, examples, and solutions to help Grade 4 students learn how to use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.

Common Core Standards: 4.MD.7

New York State Common Core Math Grade 4, Module 4, Lesson 11

Worksheets for Grade 4

Calculate Adjacent Angles Worksheets

NYS Math Module 4 Grade 4 Lesson 11 Concept Development

Problem 1: Decompose a 360° angle into smaller angles. Recognize that the smaller angles add up to 360°.

Problem 2: Given two intersecting lines and the measurement of one angle, determine the measurement of the other three angles.

NYS Math Module 4 Grade 4 Lesson 11 Problem Set

Write an equation and solve for the unknown angle measurements numerically.
Questions 1 - 4

Write an equation and solve for the unknown angles numerically.
5. O is the intersection of AB and CD.
∠DOA is 160 and ∠AOC is 20°.

6. O is the intersection of RS and TV. ∠TOS is 125°.

7. O is the intersection of WX, YZ, and UO.
∠XOZ is 36°.



NYS Math Module 4 Grade 4 Lesson 11 Homework

Write an equation and solve for the unknown angle measurements numerically.

Question 1 - 4.

5. O is the intersection of AB and CD. ∠COB is 145° and ∠AOC is 35°. Find e° and f°.

6. O is the intersection of QR and ST. ∠QOS is 55°.

7. O is the intersection of UV, WX and YO. ∠VOX is 46°. Find j°, k° and m°.

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