Class 9 Lines And Angles Quiz Set 1 1. Which of the following statements is false? A line can be produced to any desired length Through a given point, only one straight line can be drawn Two straight lines can intersect in only one point Through two given points, it is possible to draw one and only one straight line 2. The angles of a triangle are in the ratio 5 : 3: 7. The triangle is an obtuse-angled triangle an isosceles triangle a right triangle an acute-angled triangle 3. An exterior angle of a triangle is 80° and the interior opposite angles are in the ratio 1 : 3, measure of interior opposite angles are 30°, 60 30°, 90° 40°,120° 20°, 60° 4. If one angle of triangle is equal to the sum of the other two, then the triangle is an equilateral triangle a right triangle an obtuse-angled triangle an isosceles triangle 5. The diagonals of the rectangle ABCD intersect at O. If ∠COD = 78°, then ∠OAB is: 51° 45° 108° 35° 6. Sum of the measure of an angle and its vertically opposite angle is always. zero equal the measure of the original angle thrice the measure of the original angle double the measure of the original angle 7. If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2 : 3, then the greater of the two angles is 108° 90° 54° 128° 8. Two parallel lines intersect at: null three point One point two point 9. In a right angled triangle where angle A= 90° and AB=AC. What are the values of angle B 50° 45° 70° 90° 10. If a transversal intersects two parallel lines, then the consecutive interior angles are equal complementry suplementry congruent 11. If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the ____________ interior opposite angles. two three one four 12. Two complementary angles are such that twice the measure of the one is equal to three times the measure of the other. The larger of the two measures 98° 72° 54° 67° 13. Two angles whose sum is equal to 180° are called: none vertically opposite angle complementary angle supplementary angle 14. How many degrees are there in an angle which equals one-fifth of its supplement? 45° 30° 75° 15° 15. Two lines are parallel to each other, only when Their point of intersection is a unique point The lines lie on the same plane they do not intersect each other when extended on either side They are parallel to the plane in which they lie Loading …

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