life=straw

1. http://www.buylifestraw.com/en/

2. LifeStraw is a water filter designed to be used by one person to filter water so that they may safely drink it. It filters a maximum of 1000 litres of water, enough for one person for one year. It removes almost all of waterborne bacteria and parasites.

   
   

   LifeStraw products were distributed in the 2010 Haiti earthquake, 2010 Pakistan floods, and 2011 Thailand floods. In the Mutomo District in Kenya which has suffered from long term drought, the Kenya Red Cross supplied filters to 3,750 school children and 6,750 households.
   
   LifeStraw has been praised in the international media and won several awards including "Best Invention of 2005" by Time Magazine.

   
   

   Source-

   LifeStraw

   http://www.buylifestraw.com/

     
   Updated 14 Jul • View Upvotes

line.line segment,ray,complementary/supplementary angles

1. https://www.khanacademy.org/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/v/lines-line-segments-and-rays
2. https://www.ixl.com/math/geometry/lines-line-segments-and-rays
3. A line goes without end in both directions.
   A ray has 1 endpoint and goes without end in 1 direction.
   A line segment has 2 endpoints.
4. https://www.mathsisfun.com/geometry/complementary-angles.html
5. http://study.com/academy/lesson/complementary-angles-definition-theorem-examples.html
6. https://www.mathsisfun.com/definitions/supplementary-angles.html
7. https://www.mathsisfun.com/definitions/complementary-angle.html
8. 1. • 
9. Adjacent angles are two angles that have a common vertex and a common side. The vertex of an angle is the endpoint of the rays that form the sides of the angle. When we say common vertex and common side, we mean that the vertex point and the side are shared by the two angles. Below is an example of adjacent angles:

http://study.com/academy/lesson/what-are-adjacent-angles-definition-examples.html

• https://www.mathsisfun.com/definitions/adjacent-angles.html
• https://www.mathsisfun.com/geometry/adjacent-angles.html
• 1. • 
• A linear pair is a pair of adjacent angles formed when two lines intersect. In the figure, 1 and 2 form a linear pair. So do 2 and 3, 3 and 4, and 1 and 4. The two angles of a linear pair are always supplementary, which means their measures add up to 180^o.
• http://study.com/academy/lesson/linear-pair-definition-theorem-example.html
• http://www.icoachmath.com/math_dictionary/linear_pair.html

Angles & Triangles

1. https://www.mathsisfun.com/triangle.html
2. http://mathworld.wolfram.com/Triangle.html
3. http://www.factmonster.com/ipka/A0876325.html
4. http://www.coolmath.com/reference/triangles-types
5. https://www.khanacademy.org/math/geometry/triangle-properties
6. http://www.learnhive.net/learn/cbse-grade-7/mathematics/triangle-and-its-properties
7. http://www.learnhive.net/learn/cbse-grade-7/mathematics/congruence-of-triangles
8. https://www.mathsisfun.com/definitions/supplementary-angles.html

For courage,fortitude to overcome difficulties

x

For education,learning and progress

this is for wealth and prosperity

1. 
   

learn these and you will enjoy your life

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