Please can somebody help me to solve this one? I been trying but it’s not 12. It has to be something else…

The area of the whole is: 5×3=15

The area of the triangle is: 2×3/2=3

So the area of the shades region is 15-3=12

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

image result for what is another name for consecutive interior angles? ​

when two lines are crossed by another line (called the transversal): the pairs of angles on one side of the transversal but inside the two lines are called consecutive interior angles. in this example, these are consecutive interior angles: d and f.

step-by-step explanation: