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NCERT - Exemplar Mathematics

5. Lines and Angles
  • 1. Integers
  • 2. Fractions and Decimals
  • 3. Data Handling
  • 4. Simple Equations
  • 5. Lines and Angles
  • 6. Triangles
  • 7. Comparing Quantities
  • 8. Rationals Numbers
  • 9. Perimeter and Area
  • 10. Algebraic Expressions
  • 11. Exponents and Powers
  • 12. Practical Geometry Symmetry and Visualising Solid Shapes


Exercise

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Q. 774.2( 5 Votes )

The sum of two vertically opposite angles is 166°. Find each of the angles.

Class 7thNCERT - Exemplar Mathematics5. Lines and Angles

Answer :

Vertically Opposite angles are always equal


Sum of two vertically opposite angles = 166°


Each angle


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PREVIOUSThe drawings below (Fig. 5.37), show angles formed by the goalposts at different positions of a football player. The greater the angle, the better chance the player has of scoring a goal. For example, the player has a better chance of scoring a goal from Position A than from Position B.In Parts (a) and (b) given below it may help to trace the diagrams and draw and measure angles.a) Seven football players are practicing their kicks. They are lined up in a straight line in front of the goalpost [Fig.(ii)]. Which player has the best (the greatest) kicking angle?b) Now the players are lined up as shown in Fig. (iii). Which player has the best kicking angle?c) Estimate at least two situations such that the angles formed by different positions of two players are complement to each other.NEXTIn Fig. 5.38, l ||m||n.∠QPS = 35° and ∠QRT = 55°. Find ∠PQR.
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NCERT - Exemplar Mathematics

State whether the statements are True or False.

Vertically opposite angles form a linear pair.

NCERT - Exemplar Mathematics

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NCERT - Exemplar Mathematics

Find the values of the angles x, y and z in each of the following:

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(i) Vertically opposite angles.


(ii) Linear pairs.

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Two adjacent angles always form a linear pair.

NCERT - Exemplar Mathematics

The sum of two vertically opposite angles is 166°. Find each of the angles.

NCERT - Exemplar Mathematics
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