Lines, Rays, and Line Segments
Angles
Classifying Angles
Classifying Triangles
Random
100
What type of lines go on forever without touching and always stay the same distance apart?
Parallel lines
100
What is the unit for angles? (hint: think of temperature)
Degrees
100
What type of angles are across from/opposite of each other and are formed with the same two lines?
Vertical angles
100
What type of triangle has three angles with degree measures less than 90°?
Acute
100
Where did the degree come from? (hint: think of a circle)
By dividing a circle into 360 equal parts and calling one of those parts a degree
200
What type of lines meet or cross at one point?
Intersecting lines
200
How many ways can an angle be named? Give an example of an angle being named in that many ways.
Three ways; ∠ABC, ∠CBA, ∠B
200
What types of angles add up to 180°? What types of angles add up to 90°?
Supplementary angles; complementary angles
200
How many equal sides/angles does a scalene triangle have?
0
200
What type of triangle is a triangle with sides of length 7, 13, and 21?
Scalene
300
What are the names of the three figures that can be made with two points? (hint: l _ _ _, r _ _, and l _ _ _ s _ _ _ _ _ _)
Line, ray, and line segment
300
What type of angle is exactly 180°?
Straight angle
300
What is always true about vertical angles?
They have the same degree measures
300
How many degrees do the angles in a triangle add up to?
180°
300
Draw out an example of and write the notation for a line, line segment, and ray.
Answer will vary.
400
What is the name of the figure below?
Ray AB
400
What is the degree measure of a right angle?
90°
400
What degree measure is the complement of a 39° angle?
51°
400
True or false: all isosceles triangles are also equilateral triangles, and all equilateral triangles are also isosceles triangles
False; all equilateral triangles have at least two congruent sides, but not all isosceles triangles have three congruent sides
400
True or false: lines, line segments, and rays can all be named in many ways since you just use any two points on the line
False: correct for lines and line segments, but rays must be named with the endpoint first
500
What is the symbol meaning "parallel to"?
Two vertical lines: ||
500
Between what degrees does an obtuse angle need to be between?
90° and 180°
500
What degree measure is the complement of a 13.29° angle?
166.71°
500
One of the angles in a right triangle is 28°. Find the measure of the other acute angle.
62°
500
One of the angle measures in an isosceles triangle is 41.55°. What is the angle measure of the obtuse angle?
96.9°