kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

1.14 Adjacent, Congruent, Linear Pair, and Vertically Opposite Angles

  • Adjacent Angles:
    Two angles in a planes are called adjacent angles, if they have a common vertex, a common side, and their interiors do not have a common point.
    1 and 2 below are adjacent angles.

  • Congruent Angles:
    Angles having the same measure are called congruent angles. The two marked angles in the following isosceles triangle are congruent angles and d and e are congruent.
  • Linear Pair of Angles:
    A pair of adjacent angles formed by intersecting lines is called a Linear Pair of Angles.
    In the following picture, 1 & 2, 2 & 4, 3 & 4, and 3 & 4 are linear pairs.
  • Vertically Opposite Angles:
    When two lines intersect, then the angles that are opposite one another at the intersection are called Vertically Opposite Angles. The measures of the vertically opposite angles are equal.
    In the above picture, 1 & 4, and 2 & 3 are vertically opposite.

Directions: Answer the following questions. Also draw all the above kinds of angles, measure them using protractor and label them.
Q 1: Any two adjacent angles have a common ray.

Q 2: Any two adjacent angles have a common vertex.

Q 3: Any two supplementary angles are adjacent.

Q 4: Any two complementary angles are adjacent.

Q 5: Any two supplementary angles are coplanar.

Q 6: Any two right angles are supplementary.

Q 7: If two lines are perpendicular to each other, then all the pairs of vertically opposite angles formed are supplementary.

Q 8: If two angles are congruent, they are supplementary.

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!

Subscription to kwizNET Learning System offers the following benefits:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • Choice of Math, English, Science, & Social Studies Curriculums
  • Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
  • Get discount offers by sending an email to

Quiz Timer