Finding missing sides using sine and cosine for any angle

Maths

What is the length of the side marked r ?

What is the correct step for calculating the length of side b?

What is the length of of b correct to 1 decimal place?

What is the correct step for calculating the length of side a?

What is the length of a, correct to 1 decimal place?

Which ratio would you use to find the length of the missing side in the triangle below?

Complete the statement: In a right angled triangle that has an interior angle of 30 degrees, opposite/ hypotenuse = .................

Complete the statement: In a  right angled triangle that has an interior angle of 60 degrees, opposite/ hypotenuse = .................

Complete the statement: In a right angled triangle that has an interior angle of 60 degrees, adjacent/ hypotenuse = .................

Complete the statement: In a right angled triangle that has an interior angle of 30 degrees, adjacent/ hypotenuse = .................