Answer:
∠B = 41°
Step-by-step explanation:
∠BCD is an exterior angle of the triangle
The exterior angle is equal to the sum of the 2 opposite interior angles, thus
∠A + ∠B = 113
72 + ∠B = 113 ( subtract 72 from both sides )
∠B = 41°
If you would round it to the nearest tenth which is the third nine, you'd see that it would add up to the whole number 3. So the answer is 3!!
The perimeter of a rectangle can be written out as follows;
