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If two lines intersect, then vertically ...

If two lines intersect, then vertically opposite angles are......... .

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If two lines intersect at a point, the vertically opposite angles are always . . . . . . . . . . .

When two lines intersect, the vertically opposite angles so formed are _____________

Fill in the blanks: If two lines intersect at a point, then the vertically opposite angles are always_____________.

If two lines intersect and if one pair of vertically opposite angles is formed by acute angles, then the other pair of vertically opposite angles will be formed by obtuse angles.

Fill in the blank Vertically opposite angles have a common ..........

Pair of vertically opposite angles are ______

Vertically opposite angles are not always equal.

A pair of angles which lie on the opposite side if the point of intersections are called vertically opposite angles.

Find the values of the angle x,y and z in each of the following because the two lines intersect, so pair of opposite angles are equal

In the adjoining What is the vertically opposite angle of angle5

MODERN PUBLICATION-INTRODUCTION TO EUCLID'S GEOMETRY-EXERCISE
  1. Euclid belongs to the country :

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  2. Thales belongs to the country :

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  3. Pythagoras was a student of :

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  4. Which of the following needs a proof ?

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  5. Euclid stated that all right angles are equal to each other in the for...

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  6. Lines are parallel if they do not intersect is stated in the form of :

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  7. If the lines AB and AC are parallel to a line l, show that the points ...

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  8. How would you rewrite Euclid’s fifth postulate so that it would be eas...

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  9. In the fig. AX=1/2AB,AY=1/2AC and AX=AY, prove that AB=AC

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  10. Two distinct lines in a plane can have two points in common.

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  11. It is known that x+y=10 and that x=z. show that z+y=10?

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  12. Look at the figures. Show that the length AH> sum of lenghts of AB+BC+...

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  13. In fig. angleABC=angleACB and angle3=angle4. Prove that angle1=angle2

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  14. If a transversal intersects two parallel line then corresponding angle...

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  15. If a ray stands on a line, then the sum of angles so formed is equal t...

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  16. If two lines intersect, then vertically opposite angles are......... .

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  17. If a ray stands on a line, then the sum of the two adjacent angles so...

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  18. The things which are double of the same thing are equal to one another...

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  19. If equals are added to equals the wholes are equal.

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  20. The things which are double of the same thing are equal to one another...

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