Basics
How many sides does a triangle have?
three sides
What are complementary angles?
Angles that add up to 90°
What is an equilateral triangle?
A triangle with all sides equal
What is a quadrilateral?
A polygon with four sides
Formula for the area of a rectangle
A= L x W
What is a vertex?
A point where two lines meet
What do supplementary angles equal?
they add up to 180°
What is a right triangle?
A triangle with one 90° angle
What is a parallelogram?
A quadrilateral with opposite sides parallel
What is perimeter?
distance around a figure
For how long does a plane extend?
forever
What are vertical angles?
Angles opposite each other when two lines intersect
What is an acute triangle?
A triangle with all angles less than 90°
What is a rhombus?
A parallelogram with all sides equal
Formula for the area of a triangle
A= 1/2 bh
What is a circle?
A figure with all points the same distance from the center
What are consecutive interior angles?
Angles on the same side of a transversal inside parallel lines
The sum of the interior angles of a triangle
180
What is a trapezoid?
A quadrilateral with exactly one pair of parallel sides
Formula for the circumference of a circle
C= 2πr
What is a transversal?
A line that intersects two or more lines
What are corresponding angles?
Angles in the same position on different parallel lines
What is a scalene triangle?
A triangle with no equal sides
What is a rectangle?
A quadrilateral with four right angles
Formula for the area of a circle
A= πr^2