Geometry Flashcards
1
Q
What forms an angle
A
two rays (line w/ dot)
2
Q
vertex
A
common endpoint of an angle (vertices plural)
3
Q
how are angles measured
A
in degrees
4
Q
tool used to measure angles
A
protractor
5
Q
right:
acute:
obtuse:
straight:
A
right: 90 degrees
acute: less than 90
obtuse: more than 90
straight: 180
6
Q
polygons
A
closed figure made up of line segments
7
Q
side
A
where line segments meet
8
Q
triangle
A
angle degrees add up to 180
9
Q
sum of measures in a square add up to
A
360
10
Q
parallelogram
A
2 pares of parallel congruent sides
11
Q
rhombus
A
parallelogram with 4 congruent sides
12
Q
diagonal
A
line segment that joins 2 vertices not a side
13
Q
chord
A
line segments w/ endpoint on circle
14
Q
central angle
A
angle w/ vertex at center
15
Q
arc
A
part of a circle w/ all it’s points on circle
16
Q
circumference
A
π (3.14 0r 22/7) X diameter or r2
