Mathematics for IGCSE & O level - Angles (Section 4)

• 1

  What do you call angles that add up to 180 degrees?

  回答

  (B)

  Supplementary angles
• 2

  In a triangle, two angles are 50° and 80°. What is the measure of the third angle?

  回答

  (B)

  50°
• 3

  If a quadrilateral has angles of 70°, 110°, and 90°, what is the value of the fourth angle?

  回答

  (B)

  90°
• 4

  In a polygon, how are the exterior and interior angles related at any vertex?

  回答

  (C)

  They are supplementary.
• 5

  In a quadrilateral, if three angles are 80°, 100°, and 60°, what is the measure of the fourth angle?

  回答

  (B)

  110°
• 6

  If two lines are perpendicular, what is the angle between them?

  回答

  (C)

  90°
• 7

  In a parallelogram, which of the following are true?

  回答

  A

  C

  D
• 8

  Which of the following terms describes a line that intersects two or more other lines at distinct points?

  回答

  (C)

  Transversal line
• 9

  If an angle measures 45 degrees, what is the measure of its complement?

  回答

  (A)

  45°