Vocabulary - 1
What is a polygon?
A closed figure with 3 sides
What is an obtuse angle?
an angle that is greater than 90 degrees, and less than 180 degrees
What is an equilateral triangle?
a triangle with three congruent sides
180
Supplementary angles add up to how many degrees?
180
What is an acute angle?
an angle that is greater than zero, and less than 90 degrees
What are corresponding angles?
Angles that are on the inside and outside of the same side
If two angles are vertical, they are considered _________.
congruent (equal)
What is a vertex?
the point where two rays intersect
What is a right angle?
an angle that is exactly 90 degrees
What is a transversal line?
a line that intercepts through two or more lines creating multiple angles
How do you find the perimeter of a figure?
You add all the sides together
Parallel lines never _______.
intersect
What is a scalene triangle?
A triangle with no congruent sides
How many sides does a dodecagon have?
12
P = 6x
What are adjacent angles?
Angles that are next to each other
What is an isosceles triangle?
a triangle with two congruent sides
Complementary angles add up to how many degrees?
90
What is a ray?
a ray is part of a line. it has exactly one endpoint.