Math · Geometry
Angle Relationships: Complementary, Supplementary, Vertical
Use complementary, supplementary, vertical and adjacent angles and the triangle angle sum to find unknown angles.
- 🎓 Grade 7
- 🧮 Math
- 📐 7.G.B.5
- ❓ 21 questions
Play with this set
Pick a game: the questions load straight in
Opens on your board, ready to play in teams. No student devices needed.
Questions 21 questions
Answers stay hidden until you show them, so this page is safe on the projector.
What is the supplement of a 73° angle?
- A 73°
- B 107°
- C 287°
- D 17°
73° + 107° = 180°
A triangle has angles of 50° and 60°. What is the third angle?
- A 80°
- B 110°
- C 70°
- D 250°
180 − 50 − 60 = 70
Angles x and x + 20 are complementary. What is x?
- A 45°
- B 55°
- C 80°
- D 35°
2x + 20 = 90, so x = 35
Angles x and 2x are supplementary. What is x?
- A 90°
- B 30°
- C 120°
- D 60°
3x = 180
Can a triangle have sides of 3 cm, 4 cm and 9 cm?
- A No
- B Only if it is a right triangle
- C Yes
3 + 4 < 9, so the sides cannot meet.
What is the complement of a 35° angle?
- A 35°
- B 145°
- C 55°
- D 125°
35° + 55° = 90°
What is the complement of a 47° angle?
- A 133°
- B 43°
- C 137°
- D 47°
47° + 43° = 90°
Vertical angles are always equal.
True
Two lines cross. One angle is 48°. What is the measure of an angle next to it?
- A 48°
- B 312°
- C 132°
- D 42°
Adjacent angles on a line are supplementary.
Two acute angles can be supplementary.
False Two angles less than 90° add to less than 180°.
What is the supplement of a 128° angle?
- A 128°
- B 38°
- C 232°
- D 52°
128° + 52° = 180°
Two lines cross. One angle is 115°. What is the measure of an angle next to it?
- A 245°
- B 25°
- C 115°
- D 65°
Adjacent angles on a line are supplementary.
What is the complement of a 18° angle?
- A 108°
- B 162°
- C 18°
- D 72°
18° + 72° = 90°
What is the supplement of a 45° angle?
- A 136°
- B 315°
- C 135°
- D 45°
45° + 135° = 180°
What is the complement of a 62° angle?
- A 28°
- B 152°
- C 118°
- D 62°
62° + 28° = 90°
What is the supplement of a 110° angle?
- A 110°
- B 250°
- C 70°
- D 20°
110° + 70° = 180°
Two lines cross. One angle is 115°. What is the angle vertical to it?
- A 245°
- B 115°
- C 230°
- D 65°
Vertical angles are equal.
Angles (3x + 10)° and (x + 30)° are vertical angles. What is x?
- A 20
- B 10
- C 35
- D 5
3x + 10 = x + 30, so 2x = 20
A right triangle has one angle of 35°. What is the other acute angle?
- A 35°
- B 55°
- C 145°
- D 65°
90 − 35 = 55
Two lines cross. One angle is 48°. What is the angle vertical to it?
- A 48°
- B 132°
- C 42°
- D 96°
Vertical angles are equal.
Two lines cross. One angle is 72°. What is the angle vertical to it?
- A 108°
- B 72°
- C 18°
- D 144°
Vertical angles are equal.
More question sets