Vocabulary
Segments and Angles
Angle Pairs
Triangles
Polygons
100
A 1-dimensional object that goes on forever in both directions.
What is a line?
100
Draw, and write the correct name of, a line segment that starts at point P and ends at point Q.
(see picture)
100
Any two angles whose measure totals 90 degrees.
What are complementary angles?
100
A triangle whose angles only measure less than 90 degrees
What is an acute triangle?
100
The name for a polygon with five sides.
What is a pentagon?
200
Two rays that meet at a common endpoint, called the vertex
What is an angle?
200
Points J, K, and L lie along a line segment in order. If JK = 5, and KL = 7, this is the length of JL.
What is 12?
200
Two angles that share a vertex and one ray, and do not overlap.
What are adjacent angles?
200
In Triangle ABC, the measure of angle A = 55 degrees and the measure of angle B = 101 degrees. This is the measure of angle C.
What is 24 degrees?
200
The name for a polygon with 9 sides.
What is a nonagon?
300
A 1-dimensional object that goes on forever in both directions
What is a line?
300
Points W, X, and Y lie in order along a line. If WX is double the length of XY, and XY = 4, this is the length of WY.
What is 12?
300
Point E lies between points D and G on a straight line. Ray EF extends upward from line DG. This explains why angle DEF and FEG are supplementary.
Angle DEF and FEG are supplementary because they form a linear pair, and all linear pairs are supplementary.
300
In an isosceles triangle, the non-base angle measures 70 degrees. This is the measure of each base angle.
What is 55 degrees?
300
A polygon whose diagonals lie entirely inside the polygon.
What is a convex polygon?
400
A triangle with 3 equal sides
What is an equilateral triangle?
400
Two adjacent angles ABC and CBD have angle measures of 56 degrees and 21 degrees, respectively. What is the measure of Angle ABD?
What is 77 degrees?
400
Angles WXY and YXZ form a linear pair. If WXY = 5x + 15 and XYZ = 3x + 5, this is the value of x.
What is 20?
400
In triangle PQR, angle QRT is an exterior angle at vertex R. If Angle P = 20 degrees and angle Q = 48 degrees, this is the measure of angle QRT.
What is 68 degrees?
400
The measure of each exterior angle of a regular octagon.
What is 45 degrees?
500
A triangle with no equal sides
What is a scalene triangle?
500
Angle PQR has measure 85 degrees. Ray QT splits angle PQR into two smaller angles, PQT and TQR. If the measure of TQR = 37 degrees, this is the measure of PQT.
What is 48 degrees.
500
Angle ABC and DBE are vertical angles. If the measure of Angle ABC = 2x + 7 and the measure of Angle DBE = 3x + 1, find the measure of Angle ABC.
What is 19 degrees?
500
This explains why equilateral triangles cannot be right triangles.
What is: "Equilateral triangles are regular polygons, so all of their angles measure 180/3 = 60 degrees. Since right triangles must have 90 degree angles, equilateral triangles can't be right."
500
The measure of each interior angle of a regular dodecagon (12-gon).
What is 150 degrees?
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