Question

solve it fast
7 and 8

Answer 1

Answer:

7) x = 80° , y = 40°

8) Given in the explanation

Step-by-step explanation:

7) We will use exterior angle property over here

Now , x + 60° = 140° ( Exterior angle property)

∴ x = 80°

Now 140° + y = 180 (linear pair)

∴ y = 40°

8) Theorem : The sum of any two sides is always greater than the other side of the triangle . Now :-

AB + BM > AM                                      - (1)

AC + MC > AM                                      - (2)

Adding (1) and (2) :-

AB + BM + MC + AC > 2AM

∴ AB + BC + AC > 2AM  (∵ BM + MC = BC)