Answer: 
Step-by-step explanation:
You need to use the following formula that is used to find the area of a trapezoid:

Where "M"and "m" are the bases of the trapezoid and "h" is the height of the trapezoid.
Based on the information given in the exercise, you can identify that:

Knowing these values, you can substitute them into the formula:

Finally, you must evaluate in order to find its area. This is:

Answer:
53
Step-by-step explanation:
It is a trick question. 6 people to paint 6 walls will take 53. 20 people to paint 20 walls will take 53 minutes.
Answer:
<h2>∠1 = 50°</h2><h2 />
Step-by-step explanation:
<u>right triangle.</u>
∠1 = 180 - 90 - 40
∠1 = 50°
Answer:
It is called a heptahedron
Step-by-step explanation: