Session 6: Number Properties and Geometry
Terms
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- What are the factors of 48?
-
1,48
2,24
3,16
4,12
6,8 - If y>0, does y^2 + y^3 = y^5?
- No! can't add powers in this manner.
- Give the rule for side lengths of a triangle
-
-Greater than the difference of the lengths of the other 2 sides
-Less than the sum of the lengths of the other 2 sides.
Ex: triangle a,b,c.
|a-b|<c<a+b - Equilateral Triangles have ____ degrees in each angle
-
60
(because 180/3) -
Name 2 pythagorean ratios or triplets
(for the right triangles) -
1.) 3:4:5
2.) 5:12:13 -
45:45:90 Triangle (Isosceles Right Triangle)
Give the ratio lengths of sides - x:x:xRoot(2)
-
30:60:90 Triangle
Give the ratiolengths of sides -
x:Root(3)*x:2x
30:60:90 - Give formulars for circumfrance and area of circle
-
Cirm: 2PiR = Pi*D
Area: PiR^2 - Is 0 positve or negative?
- Neither
- Digit is...
- is 0,1,2,3,4,5,6,7,8,9
- Is -3 prime?
- No. Only positive integers can be prime