OBJECTIVES OF LINES AND ANGLES

LINES AND ANGLES

SRINIVASA RAMANUJAN, MAN WHO KNEW INFINITY

TRUE OR FALSE

a) Pairs of vertically opposite angles is always equal
b) The sum of all the interior angles of a triangle is 360
c) If the sum of two adjacent angles is 45, then two adjacent angles are acute angles
d) If a line is perpendicular is one of two parallel lines, then it is also perpendicular to the other
e) Two lines are intersected by any transversal, and then their corresponding angles formed are equal
f) Can we have a triangle where all the interior angles are more than 60
g) Sum of two complimentary angles is equal to 90
h) Sum of all the exterior angles of any polygon is always equal to 360

Fill in the blanks 

1. Sum of two supplementary angles is ______
2. Two lines parallel to the same line is ____  each other
3. An acute angle is always less than _____
4. Angles forming a linear pair are ______
5. If one angle of triangle is equal to the sum of other two angles, then the triangle is_____
6. if two straight lines intersect ,the adjacent angles are ______
7. Two angles whose sum is equal to 360 are known as _________
8. The median of an equilateral triangles are ____________
9. Two angles whose sum is equal to 90 are known as _________
10. The angle comes from the latin word ___________, meaning a ____________
11. Cointerior angles are known as ________________ and _________________
12.   Two angles whose sum is equal to 180 are known as _________
13.  Two angles whose sum is equal to  360 are known as _________
14. COMPLETE TH TABLE
Angle                                          30 80 11 87
Complementary angle

       Supplementary angle

13. The median of an equilateral triangles are ____________
14. A triangle is  isosceles if and only iff two altitudes are ______
15. A triangle is  isosceles if and only if any two altitudes are ______
16. Lines which are parallel to the same line are ¬¬¬¬¬¬¬¬¬_____________ to each other.

MULTIPLE CHOICE QUESTION:

1. A pair of adjacent angles is called linear pair if the sum of two adjacent angles is?
a)180          b)90         c)270           d)360

2. An exterior angle of the triangle is 110. And its two opposite interior angles are in the ratio 3:4. What are the values of those angles?
a) 50,60             b) 25,30             c) 30,40           d) 40,48

3. If the ll lines are intersected by a transversal, then each pair of corresponding angles so formed is
a)  Equal        b) complementary          c) supplementary     d) none of these

4. An angle is 140 more than its complementary angle, then angle is
a) 30                      b) 53                   c) 50                  d) none of these

5. If the supplementary of an angle is three times its complement, then angle is
a) 40                      b) 35                   c) 50                 d) 45

6. An angle is 18 less than its complementary angle. Then measure of this angle is
a) 36                      b) 48                   c) 83                  d) 81

7. Supplement of an angle is one fourth to itself. The measure of the angle is :
a) 18                     b) 36                     c) 144               d) 81

MATCH THE FOLLOWING:

                    LIST-A                                      LIST-B
              P) corresponding angles             1) ∠1=∠7
                Q) alternate interior angles       2) ∠4+∠5=180
                R) alternate exterior angles       3) ∠1=∠5
               S) co-interior angles                  4) ∠4=∠6

 CODE:        
               P      Q       R      S
a)        4         1        2      3
b)        3         2        4      1
c)        4         2        1      3
d)           3         4        1      2