You know angles B and C are both 60°, the values of the angles in an equilateral triangle. Since the sum of angles in a quadrilateral is 360°, you have
B + C + x + y = 360°
60° +60° + x + y = 360°
x + y = 240°
If you want the area of the entire trapeziod.
The formula for area of a trapeziod is:
1/2h(b₁+b₂)
So the equation applied to the trapeziod is:
2.5(20+12)
20+12 is 32. 32 multiplied by 2.5 is 80.
<h3><u><em>
Ｙｏｕｒ ａｎｓｗｅｒ ｉｓ ８０.</em></u></h3>
Answer:
30 divided by 0.40 = 75
The original price was $75
Step-by-step explanation:
Answer: 9 boys
Explanation:
3/11= x/33
11x= 99
x=9
