Question

Find the marked angle on the following rectangle.​

Answer 1

Answer:

30 degrees

Step-by-step explanation:

We know that: ∠DAB = 90 degrees

(Each angle of a rectangle is of 90 degrees)

So, ∠DAE +  ∠EAF + ∠FAB = 90 degrees - (i)

∵ 18 degrees + 42 degrees + ∠EAF = 90 degrees

= ∠EAF + 60 degrees = 90 degrees

= ∠EAF = 90 degrees - 60 degrees

= ∠EAF = 30 degrees