Triangle
, What is triangle?
A triangle is a polygon with three sides having
three vertices. The angle formed inside the
triangle is equal to 180 degrees.
, Theorems and Properties
1. The sum of the three angles of a triangle is equal to two
right angles or 180 .
2. The sum of two sides of a triangle is greater
than the third side, and their difference is less than the
third side.
3. Two triangles are said to be similar if the corresponding
angles are congruent and the corresponding side lengths
are proportional.
, Theorems and Properties
4. If two sides of a triangle are
equal (an isosceles triangle),
the angles opposite these sides
are equal.
5. If two sides of a triangle are
unequal, the angles opposite
are unequal, and the greater
angle is opposite the greater
side
, What is triangle?
A triangle is a polygon with three sides having
three vertices. The angle formed inside the
triangle is equal to 180 degrees.
, Theorems and Properties
1. The sum of the three angles of a triangle is equal to two
right angles or 180 .
2. The sum of two sides of a triangle is greater
than the third side, and their difference is less than the
third side.
3. Two triangles are said to be similar if the corresponding
angles are congruent and the corresponding side lengths
are proportional.
, Theorems and Properties
4. If two sides of a triangle are
equal (an isosceles triangle),
the angles opposite these sides
are equal.
5. If two sides of a triangle are
unequal, the angles opposite
are unequal, and the greater
angle is opposite the greater
side
