Step-by-step explanation:
I don't really know what demonstrating with rigid motion means, never heard that before. But a method for demonstrating it could be drawing circumferences of radius:
1) R1 = d(O,S)
2) R2 = d(O,J)
3) R3 = d(O,M)
With O being the origin of the reference system.
*Note: d(A,B) means distance between point A and point B
After you've done that you can show that the points S and P are on the same circumference, J and W are on the same circumference (different from the one of S and P), M and D are on the same circumference.
After you've done that you calculate the angle between the points on the same circumference and demonstrating that they are all the same.
Answer:
Perpendicular
Step-by-step explanation:
It is a symbol used for showing any two lines perpendicular to each other.
A hexagon has 6 sides so 4x6=24
39-24=15
A pentagon has 5 sides so 15/5=3
There would be 3 pentagons
Complete Question:
The area of a trapezium is 400 cm2, the distance between the parallel sides is 16 cm. If one of the parallel sides is 20 cm, then the length of the other side is ______
Answer:
![Side\ 2 = 30cm](https://tex.z-dn.net/?f=Side%5C%202%20%3D%2030cm)
Step-by-step explanation:
Given
--- Area
--- Height
![Side\ 1=20cm](https://tex.z-dn.net/?f=Side%5C%201%3D20cm)
Required
The length of the other side (Side 2)
The area of a trapezium is:
![A = \frac{1}{2}(Side\ 1 + Side\ 2) * h](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B1%7D%7B2%7D%28Side%5C%201%20%2B%20Side%5C%202%29%20%2A%20h)
![400 = \frac{1}{2}(20 + Side\ 2) * 16](https://tex.z-dn.net/?f=400%20%3D%20%5Cfrac%7B1%7D%7B2%7D%2820%20%2B%20Side%5C%202%29%20%2A%2016)
![400 = (20 + Side\ 2) * 8](https://tex.z-dn.net/?f=400%20%3D%20%2820%20%2B%20Side%5C%202%29%20%2A%208)
Divide both sides by 8
![50 = 20 + Side\ 2](https://tex.z-dn.net/?f=50%20%3D%2020%20%2B%20Side%5C%202)
Collect Like Terms
![Side\ 2 = 50 - 20](https://tex.z-dn.net/?f=Side%5C%202%20%3D%2050%20-%2020)
![Side\ 2 = 30cm](https://tex.z-dn.net/?f=Side%5C%202%20%3D%2030cm)