Geometry Terms By Justin And Raleigh

3 types of angles Right Angle- An angle that is 90 degrees. Acute Angle- An angle that is under 90 degrees. Obtuse Angle- An angle that is over 90 degrees but under 180 degrees.

3 types of triangles named by sides 1. Equilateral triangle-all sides are congruent 2. Isosoles triangle-two sides are congruent 3.Scalene triangle-no sides are congruent

3 types of triangles named by angles Right triangle- A triangle that has one 90 degree angle. Acute triangle- all angles are less than 90 degrees. Obtuse triangle- A triangle that has one angle that is over 90 degrees and under 180 degrees.

Lines 1. intersecting lines-two lines that intersect 2. perpendicular lines-an angle that meets at a right angle 3. parallel lines- 2 lines that never intersect

Congruent Two lines that have the same length.

adjacent angles that are next to each other

Vertical Angles an angle diagonal from each other.

supplementary angles when 2 angles have a sum of 180*

Complamentary Angles When two angles have the sum of 90 degrees.

types of quadrilaterals trapezoid-exactly 1 pair of parallel sides parallelogram-opposite's sides are parallel and congruent rhombus-all 4 sides congruent rectangle-4 right angles square-all 4 sides congruent and 4 right angles

Parts of a circle Diameter- the distance from one side of a circle to the other. Radius- distance from the middle of a circle to an endpoint. Circumfrance- the distance around the circle.

perimeter and circumference perimeter-all sides added up circumference-distance around a circle

Area of shapes Triangle- Base times Height divide by 2. Rhombus- Base times Height. Squares- Base times Height. Rectangle- Length times Width. Parallelogram- Base times Height. Circle- times Radius squared.