Students find a missing supplementary angle of 133°, compute a complementary angle of 56° for a 34° angle, and find the fourth angle of a quadrilateral with three known angles. Part B has five fill-in-the-blank problems about supplementary sums, the triangle angle sum, and the complement of 27°.
Missing angle problems require students to apply angle-sum rules rather than measure directly — a key algebraic thinking step.
Style:
Angles and Angle Measurement
Part A: Multiple Choice
Circle the best answer for each question.
1. Two angles form a straight angle. One measures 47°. What is the other?
A) 43°
B) 53°
C) 133°
D) 143°
2. Angle X and a 34° angle are complementary. What is angle X?
A) 46°
B) 56°
C) 66°
D) 146°
3. Three angles of a quadrilateral are 90°, 90°, and 115°. What is the fourth angle?
A) 55°
B) 65°
C) 75°
D) 85°
4. Which angle is acute?
A) 91°
B) 89°
C) 180°
D) 90°
Part B: Fill in the Blank
Write the correct answer on each line.
1. Two supplementary angles add up to 180 degrees.
2. If a triangle has angles of 60° and 80°, the third angle is 40 degrees.
3. The complement of a 27° angle is 63 degrees.
4. An angle of 90° minus 15° minus 25° equals 50 degrees.
5. A straight angle split into three equal parts gives angles of 60 degrees each.
Angles and Angle Measurement
★ Part A: Multiple Choice
Circle the best answer for each question.
1. Two angles form a straight angle. One measures 47°. What is the other?
A) 43°
B) 53°
C) 133°
D) 143°
2. Angle X and a 34° angle are complementary. What is angle X?
A) 46°
B) 56°
C) 66°
D) 146°
3. Three angles of a quadrilateral are 90°, 90°, and 115°. What is the fourth angle?
A) 55°
B) 65°
C) 75°
D) 85°
4. Which angle is acute?
A) 91°
B) 89°
C) 180°
D) 90°
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) Two supplementary angles add up to 180 degrees.
2) If a triangle has angles of 60° and 80°, the third angle is 40 degrees.
3) The complement of a 27° angle is 63 degrees.
4) An angle of 90° minus 15° minus 25° equals 50 degrees.
5) A straight angle split into three equal parts gives angles of 60 degrees each.
Ready to Practice?
Complete each section carefully.
9 Questions
12-18 minutes
Auto-graded
Retry anytime
🏆
Questions Correct
0
Correct
0
Incorrect
0
Skipped
0:00
Time
0%
Score
Review Your Answers
See what you got right, missed, or skipped.