Lines
A series of points that extends in opposite directions without end?
A line
Two opposite angles formed by intersecting lines.
What are vertical angles?
A triangle whose angles each measure less than 90 degrees.
What is an acute triangle?
How many sides does a quadrilateral have?
4 sides
What is a vertex?
The intersection point of two sides of a plane figure.
A flat surface with no thickness? It extends in all directions with no end.
What is a plane?
Two angles that share a vertex and a common side.
What are adjacent angles?
A triangle with two sides the same length.
Isosceles triangle
What's the number of degrees all angles of a quadrilateral will add up to?
360 degreees
What is a circle?
The set of all points in a plane that are a given distance from the center
A section that has two endpoints? A section that has one endpoint?
What is a line segment?
What is a ray?
Pairs of angles which lie on the same side of a transversal and are in the 'same position'.
Corresponding angles.
A triangle with one angle greater than 90 degrees.
Obtuse triangle.
This is a quadrilateral with two pairs of opposite sides parallel and 4 right angles
A rectangle
What is an angle bisector?
A ray that divides an angle into two congruent adjacent angles.
A line that intersects at a right angle?
What are perpendicular line?
Two angles whose sum is 90 degrees.
What are complementary angles?
A triangle with a 90 degree angle and no sides the same length
Right, scalene triangle.
This is a quadrilateral with two pairs of opposite sides parallel and all sides the same length.
A rhombus
What is coplanar?
lying in the same plane
The line called that does not lie in the same plane and do not intersect?
What are skew lines?
A pair of angles which lie on opposite sides of the transversal on the interior of a pair of lines.
What are alternate interior angles?
All angles in every triangle will add up to this number of degrees
180 degrees
This is a quadrilateral with only one pair of opposite sides parallel,
A trapezoid
What is geometry?
The study of geometric figures in two dimensions (plane geometry) and three dimensions (solid geometry). It includes the study of points, lines, triangles, quadrilaterals, other polygons, circles, spheres, cubes, cuboids, prisms, pyramids, cones, cylinders, and polyhedra. Geometry typically includes the study of axioms, theorems, and two-column proofs.