We can use trigonometry. The cosine of 15 will be the side adjacent to the 15-degree side (the one we are looking for) divided by 20, the hypotenuse. As cos(15) is about .966, we get 19.32 as the side we are looking for.
Answer:
Step-by-step explanation:
192
Answer:
3
Step-by-step explanation:
Answer:
Options (2) and (5)
Step-by-step explanation:
Given ratio is a : b and b : c

[Option 2]

b × b = a × c
b² = ac
If a = b,
b² = bc
b = c [Option 5]
Therefore, Options (2) and (5) are the correct options.