Geometry Terms
An angle that is greater than 90°
Obtuse Angle
How many total degrees are in a protractor?
180°
What are polygons?
A plane figure with at least 3 straight sides and angles.
How many minutes are in 1 degree
60 minutes
What is the sum of angles for a triangle?
180°
A tool used to measure angles
Protractor
What do the numbers on a protractor represent?
The degrees of an angle.
What is a 5 sided polygon called?
A pentagon
How do you find the number of diagonals in a polygon?
n(n - 3)/ 2
What is the sum of angles in a quadrilateral?
360°
Two lines that do not intersect
Parallel lines
Where do you place a protractor when taking the measurement of an angle?
The center point or vertex
How many sides and angles does a hexagon have?
6
How many seconds are in 1 degree?
3600 seconds
What is the supplementary to an angle that measures 50°?
130°
Lines that are on the same plane
Coplanar Lines
What is the difference between the inner and outer scale of a protractor?
The inner scales measures the angle opening to the right and the outer scale measure the angle opening to the left.
Which of the following is not a quadrilateral?
A. Rhombus
B. Square
C. Triangle
D. Rectangle
Triangle
F + V - E = 2
Euler's Formula
What is the complementary to an angle that measures 20°?
70°
Two angles that are side by side and share a common vertex and a side
Adjacent angles
By looking at a protractor, what is the measurement of an angle that measure from 70° to 120°?
50°
What is a 47-sided polygon called?
47-gon
How do you find the sum of the interior angles in a polygon?
(n - 2) x 180
What is the supplementary to an angle that measures 80°?
100°