Angles and Polygon
A pair of non-adjacent angles formed by the intersection of two straight lines.
Vertical Angle
A type of triangle in which all the three internal angles of the triangle measure less than 90°
Acute Triangle
Property of a parallelogram where opposite angles are congruent
POAC
A straight line which touches the circle at only one point
Tangent of a circle
Any geometry which is not based on Euclid’s 5 postulates and assumptions.
Non-Euclidean Geometry
A polygon that has at least one interior angle greater than 180 degrees.
The sum of two sides of a triangle is always greater than the third side.
Triangle Inequality
Diagonals are perpendicular and it bisect the angles.
What is rhombus property?
A smooth curve joining two endpoints; ____ of a circle is defined as the part or segment of the circumference of a circle.
Arc
He was able to prove that the summit angles are congruent.
Girolamo Saccheri