Answer:
2. 39 cm
Step-by-step explanation:
Jack is 1.79m
1.79 + 2.8= 4.59 m
4.59-4.2= 0.39m
0.39 m= 39 cm
b=-3/4 or b=-0.75
Hope it helps! :)
105°
< 3 = 50° + 55° { exterior angle of a triangle is equal to the sum of two opposite interior angles }
<3 = 105°
Hope this helps you.
