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Triangle
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Triangles ALWAYS have 3 sides. The interior angles of a triangle add up to 180 degrees. Here are the triangles you are expected to know about: 1. Equilateral Triangle 2. Isosceles Triangle 3. Right- Angled Triangle 4. Scalene Triangle
Key Concepts:
Terms in this set (12)
Equilateral Triangle
a triangle with three equal sides
and three equal angles 60 degrees
Isosceles Triangle
a triangle with two equal sides
so two opposing angles will be equal
Right Triangle
One angle in the triangle measures exactly 90 degrees.
Scalene Triangle
a triangle with no two sides of equal length
Triangles ALWAYS have?
-3 sides
-interior angles of a triangle add up to 180 degrees.
If one angle of a triangle is 35 degrees the second 55 degrees the 3rd part must be?
The 3rd part must be 90 degrees because the interior angles must always add up to 180.
Parallelogram
a quadrilateral whose opposite sides are parallel and congruent
Triangle Area
base times height divided by 2
ONLY 3 different ways a triangle can be
There can be 3 (eqilateral), 2 (Isosceles)or no equal sides/angles (scalene)
Obtuse Triangle
Has an angle more than 90°
Right Triangle
Has a right angle (90°)
Acute Triangle
All angles are less than 90°
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