Answer:
A
Step-by-step explanation:
:)
Answer:
![180\ \text{cm}^2](https://tex.z-dn.net/?f=180%5C%20%5Ctext%7Bcm%7D%5E2)
Step-by-step explanation:
a = 20 cm
b = 10 cm
c = 13 cm
Distance between the parallel sides is found using the Pythagoras theorem.
![h=\sqrt{c^2-d^2}](https://tex.z-dn.net/?f=h%3D%5Csqrt%7Bc%5E2-d%5E2%7D)
![\Rightarrow h=\sqrt{13^2-5^2}](https://tex.z-dn.net/?f=%5CRightarrow%20h%3D%5Csqrt%7B13%5E2-5%5E2%7D)
![\Rightarrow h=12\ \text{cm}](https://tex.z-dn.net/?f=%5CRightarrow%20h%3D12%5C%20%5Ctext%7Bcm%7D)
Area of a trapezium is given by
![A=\dfrac{a+b}{2}h](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7Ba%2Bb%7D%7B2%7Dh)
![\Rightarrow A=\dfrac{20+10}{2}\times 12](https://tex.z-dn.net/?f=%5CRightarrow%20A%3D%5Cdfrac%7B20%2B10%7D%7B2%7D%5Ctimes%2012)
![\Rightarrow A=180\ \text{cm}^2](https://tex.z-dn.net/?f=%5CRightarrow%20A%3D180%5C%20%5Ctext%7Bcm%7D%5E2)
The area of the trapezium is ![180\ \text{cm}^2](https://tex.z-dn.net/?f=180%5C%20%5Ctext%7Bcm%7D%5E2)
The rule to figuring out the area of a circle is A=r^2*pi.
So since the radius is half of the diameter you will ne to cut 25 in half. Which equals 12.5. OK so now we need to multiply 12.5 by 12.5 which equals 156.25.
So i believe that the Answer is C. 156.25pi m^2
I'm assuming this is in rectangle format. The answer would be 1056
First you find the radius, so 10/2 = 5. Then you do the circle area formula <em>πr</em>2. So, 3.14 x 5². Which gets you 78.54. Hope this helps.