Can you please solve this?

1) d

2) d

3) yes

4) no

5) B

Step-by-step explanation:

1) Angle opposite the longest side is the greatest.

AB < BC < AC

Therefore,

Angle C < Angle A < Angle B

2) angle A = 180 - 55 - 45 = 80

Angle B < Angle C < Angle A

AC < AB < BC

3) 9, 12, 15

To form a triangle;

longest side < sum of two shorter

sides

15 < 9 + 12

15 < 21 is a true statement

4) 4, sqrt(12), 7

To form a triangle;

longest side < sum of two shorter

sides

7 < 4 + sqrt(12)

7 < 7.46 is a false statement

5) To form a triangle;

longest side < sum of two shorter

sides

This is satisfied only in B

19 < 9 + 11

19 < 20 is a true statement

12*c

step-by-step explanation: