Elijah's Scribepost for December 10 2010

In class today, we classified triangles by its sides, and angles. We also learned more about SAS (side, angle, side).

Classifying Triangles by side:

• Scalene: All Sides are different
• Isosceles: 2 sides are the same.
• Equilateral: 3 sides are equal.

Classifying Triangles by Angle

• Right angle: One angle equals 90°
• Obtuse angle: One angle's greater than 90°
• Acute angle: All angle's are less than 90°
• Equiangular: All angles equal 60°

Other Tringle facts

• All triangles have an interior measure that sums to 180°
• Right triangle:



• Equiangular :
  
  
• Obtuse :
  
• Acute :

SAS (side, angle, side):
If sides and angles are proportional the triangles are similar.

Then we got to solve a problem: Find the b and the h.

Solve:

The next problem is based on a right triangle. Find the a b and c

Solve:

Homework :
Extend 18 and 20
Homework book/ Extra practise