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Three or more lines that intersect at the same point
If a point is on the angle bisector, the distance from the two sides of the angle
A segment or Ray the perpendicularly bisects a side of a 🔺
Classifying by ANGLES
a positive exponent means the original decimal needs to move to the _______________________
One angle is GREATER than 90
A segment or Ray that cuts an < into two ️congruent <'s
The point where three perpendicular bisectors of a triangle intersect
The perpendicular bisectors of a triangle intersect at a point that is equidistant from "these" of the triangle
What is the apothem called In a triangle?
The point where the three altitudes of a triangle intersect
The point where three angle bisectors of a triangle intersect
A segment or Ray that joins a vertex to the midpoint of the opposite side
The point where three medians of a triangle intersect
The segment that connects two different midpoints within the same triangle
The angle bisectors of a triangle intersect at a point that is equidistant from all of "these" of the triangle
Triangle with a 90° angle
Triangle with 2 equal sides and 2 equal angles.
A triangle with no congruent sides
A triangle with three acute angles.
All angles of an acute triangle are equal.
A triangle with one right angle.
A triangle with one obtuse angle.
sides of a triangle that share a vertex
in a right triangle, the side opposite the right angle
the number that is written with an exponent
inside angles when sides of triangle are extended
outside angles adjacent to the interior angles when the sides of a triangle are extended
Triangle Sum Theorem
angles add up to 180°
Exterior angle theorem
The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.
Third Angles Theorem
If 2 angles of one triangle are congruent to 2 angles of another then the third angles are also congruent
Base Angles Theorem
If 2 sides of a triangle are congruent then the angles opposite are congruent (used with isosceles)
Converse of the Base Angles Theorem
If 2 angles of a triangle are congruent then the sides opposite are congruent (used with isosceles)
Perpendicular Bisector Theorem
if the perpendicular bisector goes through a vertex of a triangle the legs will be congruent
the length of the perpendicular line between a point and a line.
always opposite the largest angle
always opposite the smallest angle
The sum of any 2 sides is > the third side (used to determine if 3 lengths can form a triangle OR to find the possible lengths of a 3rd side)
when three or more lines intersect (point of concurrency)
A plane figure with the same size and shape.
To divide into two equal parts
A pair of adjacent angles whose non-common sides are opposite rays.
Angles that add to 180 degrees.
Two angles whose sum is 90 degrees.
pair of opposite congruent (equal) angles formed by intersecting lines
All sides are different lengths.
two sides have the same length
all sides have the same length
a closed figure made by joining line segments where each line segment intersects exactly 2 others
A triangle with all angles measuring less than 90 degrees.
A triangle with all angles measuring more than 180 degrees.