area of rectangle = l×b
So, area of drawing = l×b = 8cm×4cm = 32cm²
The sum of the opposite interior angles is equal to the exterior angle.
So,
∠CAB + ∠ACB = ∠CBD
x + 40 + 3x + 10 = 6x
4x + 50 = 6x
2x = 50
x = 25°
∠CAB = x + 40 = 25 + 40 = 65°
Hence, the answer is D.
5c + 30 because you use the distributive property 5 x c + 5 x 6
