Find the missing angle (a)

a= cm

solve with law of sines:

just to be clear, it looks like a is a side length here, not an angle

law of sines says that a (side length)/ (sine of angle opposite to side) is equal to another (side length)/ (sine of its opposite angle)

in this triangle you see you have one known ratio that is the 3.5 cm opposite to the right angle which is 90 degrees

3.5/ sin 90

note: sin 90 =1

then with the unknown side a

a/ sin 45

note: sin 45 =

and these ratios are equal according to law of sine

3.5/ sin 90= a/ sin 45

3.5/ 1 = a/

3.5=

a= 3.5/

rationalize

=cm

hope this helps!! gl

step-by-step explanation:

answer: 12x^2+6x

step-by-step explanation:

6x does not equal 24x. hope it works!