Vocabulary Geometry

Question 1

The sum of all 3 triangle is 180 degrees

Answer 1

Triangle Sum Theorem

Question 2

If two sides of a triangle are congruent, then the angels opposite those sides are congruent

Answer 2

Isosceles Triangle Theorem

Question 3

If two angels of a triangle are congruent, then the sides opposite those sides are congruent

Answer 3

Converse of the Isosceles Triangle Theorem

Question 4

A triangle with no congruent sides

Answer 4

Scalene Triangle

Question 5

A triangle with 3 congruent sides

Answer 5

Equilateral triangle

Question 6

A triangle with 3 congruent angles

Answer 6

Equiangular Triangle

Question 7

The measures of each exterior angle of a triangle equals the sum of its two remote interior angles

Answer 7

Exterior Angle Theorem

Question 8

If a line bisects the vertex angle of an isosceles triangle, then the line is also the perpendicular bisector of the base

Answer 8

Angle Bisector of an Isosceles Triangle Theorem

Question 9

If two angles form a linear pair, then they are supplementary.

Answer 9

Linear Pair Postulate

Question 10

Vertical angles are congruent

Answer 10

Vertical Angle Theorem

Question 11

Two lines that intersect to form right angles

Answer 11

Perpendicular Lines

Question 12

If two lines cut by a transversal are parallel, then the alternate interior angles are congruent

Answer 12

Alternate Interior Angle Theorem

Question 13

If two line are cut by a transversal and the alternate interior angles are congruent, then the lines must be parallel.

Answer 13

Converse of the Alternate Interior Angle Theorem

Question 14

for any angle, the measure of the whole is equal to the sum of the measures of its non-overlapping parts

Answer 14

Angle Addition Postulate

Question 15

The point of concurrency located 2/3 the distance from the vertex

Answer 15

centroid

Question 16

The longest side is opposite the largest angle

Answer 16

Opposite Side Inequality Theorem

Question 17

The measure of the exterior angle of a triangle is greater than either of its corresponding remote interior angles

Answer 17

Exterior Angle Inequality Theorem

Question 18

The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

Answer 18

Triangle Inequality Theorem

Question 19

an equation that states two ratios are equal

Answer 19

Proportion

Question 20

the common ratio of corresponding sides

Answer 20

Scale Factor

Question 21

A point on a segment that divides the segment into 2 congruent segments.

Answer 21

Midpoint

Question 22

the perpendicular drawn from the vertex of the triangle to the opposite side
(Look at number 22 on paper)

Answer 22

Altitude

Question 23

a line segment that joins a vertex to the mid-point of the side that is opposite to that vertex
(Look at number 23 on paper)

Answer 23

Median

Question 24

the line or line segment that divides the angle into two equal parts
(Look at number 24 on paper)

Answer 24

Angle Bisector

Question 25

lines passing through the midpoint of each side which are perpendicular to the given side.
(Look at number 25 on paper)

Answer 25

Perpendicular Bisector