Lines
Two lines in a plane that never intersect.
What is PARALLEL
This is the term for a 90 degree angle
What is RIGHT ANGLE
A triangle that has all sides the same length
What is equilateral
bh/2
Area of a TRIANGLE.
The distance around a figure
What is a PERIMETER
A third line that intersects a pair of parallel lines and forms eight angles.
What is TRANSVERSAL
An angle that is less than 90 degrees
What is ACUTE
A triangle with two sides the same length
What is isosceles
lw or bh
Area of a rectangle
The distance across a circle through it's center point.
What is a DIAMETER
This has one endpoint and continues in one direction forever
What is a RAY
an angle that is greater than 90 degrees
What is OBTUSE
A triangle with one angle greater than 90 degrees
What is obtuse triangle
1/2h(b1 + b2 )
Area of a trapezoid
Line segments that have the same length or angles that have the same measure.
What is CONGRUENT
This is part of a line
What is a line segment
this is the number of degrees in a straight angle
What is 180 degrees
A triangle with a 90 degree angle and no sides the same length ( two types )
What is right, scalene
1/3Bh
What is volume of a pyramid
A flat surface , the side or base of a prism
What is FACE
This is a closed figure with at least 3 sides.
What is a polygon
These angles share a common side wall and vertex.
What is an ADJACENT ANGLE
All angles in every triangle will add up to this number of degrees
What is 180 degrees
The sum of all sides of a figure
What is PERIMETER
Lines that intersect to form a right angle.
What is PERPENDICULAR.