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Missing angle in a quadrilateral

Grade 8 math · Fieldbook Learning

Name ______________________ Date __________

Find the total of the interior angles, then subtract the angles you know.

  1. Three angles of a quadrilateral measure 131°, 122° and 87°. What is the measure of the remaining angle, in degrees?
  2. Three angles of a quadrilateral measure 106°, 146° and 88°. What is the measure of the remaining angle, in degrees?
  3. Three angles of a quadrilateral measure 43°, 164° and 133°. What is the measure of the remaining angle, in degrees?
  4. Three angles of a quadrilateral measure 72°, 58° and 210°. What is the measure of the remaining angle, in degrees?
  5. Three angles of a quadrilateral measure 25°, 89° and 226°. What is the measure of the remaining angle, in degrees?
  6. Three angles of a quadrilateral measure 159°, 136° and 45°. What is the measure of the remaining angle, in degrees?
  7. Three angles of a quadrilateral measure 168°, 66° and 106°. What is the measure of the remaining angle, in degrees?
  8. Three angles of a quadrilateral measure 28°, 64° and 248°. What is the measure of the remaining angle, in degrees?
  9. Three angles of a quadrilateral measure 120°, 11° and 209°. What is the measure of the remaining angle, in degrees?
  10. Three angles of a quadrilateral measure 102°, 144° and 94°. What is the measure of the remaining angle, in degrees?
  11. Three angles of a quadrilateral measure 42°, 106° and 192°. What is the measure of the remaining angle, in degrees?
  12. Three angles of a quadrilateral measure 22°, 141° and 177°. What is the measure of the remaining angle, in degrees?
  13. Three angles of a quadrilateral measure 104°, 80° and 156°. What is the measure of the remaining angle, in degrees?
  14. Three angles of a quadrilateral measure 72°, 156° and 112°. What is the measure of the remaining angle, in degrees?
  15. Three angles of a quadrilateral measure 139°, 112° and 89°. What is the measure of the remaining angle, in degrees?
  16. Three angles of a quadrilateral measure 149°, 37° and 154°. What is the measure of the remaining angle, in degrees?
  17. Three angles of a quadrilateral measure 28°, 88° and 224°. What is the measure of the remaining angle, in degrees?
  18. Three angles of a quadrilateral measure 97°, 123° and 120°. What is the measure of the remaining angle, in degrees?
  19. Three angles of a quadrilateral measure 166°, 14° and 160°. What is the measure of the remaining angle, in degrees?
  20. Three angles of a quadrilateral measure 120°, 94° and 126°. What is the measure of the remaining angle, in degrees?
More free practice: fieldbooklearning.com/practice/grade-8/missing-angle-in-a-quadrilateral/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
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Answer key: Missing angle in a quadrilateral

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