Angles
Triangles
Formulas and Vocabulary
Right Triangles and Vocabulary
All Vocabulary
100
I measure less than 90 degrees but greater than 0 degrees.
What is an acute angle?
100
I am an angle with one 90 degree angle and two angles that measure less than 90 degrees.
What is a right triangle?
100
A point which divides the line segment into two EQUAL parts
What is a midpoint?
100
Every right triangle has one angle that measures....
What is 90 degrees (right angle).
100
Angles that add up to 180 degrees and form a straight angle.
What are Supplementary Angles? The two angles (140° and 40°) are Supplementary Angles, because they add up to 180 degrees.
200
I am an angle that measures exactly 180 degrees.
What is a straight angle?
200
I am a triangle with one angle that measures greater than 90 degrees and two angles that measure less than 90 degrees.
I am an obtuse triangle.
200
A straight line that divides an ANGLE or LINE into two equal parts.
What is a bisector?
200
I am the longest side of a right triangle and I am ALWAYS opposite the right angle.
What is hypotenuse?
200
Part of a line that connects two points which are considered to be its endpoints. It is the distance between two points that can be measured. The line segments have a defined length, they can form the sides of any polygon.
What is a line segment?
300
I measure greater than 90 degrees but less than 180 degrees.
What is an obtuse angle?
300
I am a triangle with three angles that all measure less than 90 degrees.
What is an acute triangle?
300
Where two straight lines or rays meet at a common endpoint.
What is an angle?
300
Two angles that add up to 90 degrees.
What are Complementary angles? For example, (40° 50° angle are Complementary Angles, because they add up to 90°.
300
A straight arrangement of points with infinite length (no ends) but no thickness. I extend in both directions without end (infinitely).
What is a line?
400
I am a an angle that measures exactly 90 degrees.
What is a right angle?
400
A triangle that has all its sides equal in length. Since the three sides are equal therefore the three angles, opposite to the equal sides, are equal in measure.
What is an equilateral triangle?
400
Use this formula to find the halfway point between two coordinates on a graph.
400
Two lines that meet or intersect each other at right angles (90∘).
What are perpendicular lines?
400
Two or more lines that meet at a point.
What are intersecting lines?
500
I am an that is more than 180 degrees and less than 360 degrees.
What is a reflex angle?
500
A triangle that has all its sides of different lengths. It means all the sides of a scalene triangle are unequal and all the three angles are also of different measures.
What is a scalene triangle?
500
This is the formula used to find the distance between to points.
500
Use this formula to find the measure of any side of a right triangle.
What is...
500
A straight line that makes the right angle (90 degrees) with another line. In other words, lines that intersect each other at the right angle.
What are perpendicular lines?
