Geometry
By:Braylee Koehl
Types of Angles
Straight Angle
Right Angles
Obtuse Angles
Quadrilaterals
Rectangle
: Opposite sides are congruent : All 4 angles are right angles
Rhombus
: Opposite sides parallel : All sides congruent : Opposite angles are congruent
Parallelogram
: Opposite sides congruent : Opposite angles congruent : Opposite sides parallel
Square
: All angles are right-90 degrees :Opposite sides are congruent
Trapezoid
: Exactly one pair of parallel sides
Finding Missing Angles for Quadrilaterals
If a,d is 105 and 75 degrees the other sides of the trapezoid would be the same and it would add up to 360 degrees
Types of Triangles
Equilateral Triangle
: 3 congruent angles : 3 congruent sides
Isosceles Triangle
: 2 congruent sides : 2 congruent angles
Scalene Triangle
: 0 congruent sides : 0 congruent angles
Right Triangle
: 1 right angle : 2 acute angels
Acute Triangle
: 3 acute angles
Obtuse Trigngle
: 1 obtuse angle : 2 acute angles
Finding Missing Angles for a Trigales
The other angles have to be the same congruent.
1. subtract 50 by 180 and you get 130
2. divide 130 by 2 and you get your answer witch is 65 degrees.