Question

EXERCISE 8.1
1.
The angles of quadrilateral are in the ratio 3:5:9:13. Find all the angles of the
quadrilateral.​

Answer 1

Answer:

3x +5x +9x +13x = 360°

30x = 360°

x = 12

Step-by-step explanation:

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Answer 2

Answer:

the sum of the angles of a quadrilateral is 180 degree

the 1st angle  is 3/(3+5+9+13)*180 degree

=3/30*180 degree

=3*6 degree

=18 degree

the 2nd angle is

5/(3+5+9+13)*180 degree

=5/30*180 degree

=5*6 degree

=30 degree

the 3rd angle is

9/(3+5+9=13)*180 degree

=9/30*180 degree

=9*6 degree

=54 degree

the 4th angle is

13/(3+5+9+13)*180 degree

=13/30*180 degree

=13*6 degree

=78 degree

Step-by-step explanation: