Show:
Lines and Segments
Triangles
Quadrilaterals
Angles
Points, Lines, and Rays
100
A straight line that continues in opposite directions forever.
What is a line?
100
A triangle with sides that are all the same length.
What is an equilateral triangle?
100
Draw a quadrilateral with only one set of parallel sides.
What is a trapezoid?
100
Two rays with a common end point.
What is an angle?
100
A fixed position in space.
What is a point?
200
A straight line that has definite end points.
What is a line segment?
200
A triangle with only 2 equal sides.
What is an isosceles triangle?
200
Draw a shape that has 2 pairs of parallel lines.
What is a parallelogram?
200
An angle that is 90 degrees.
What is a right angle?
200
A straight line with one definite end and the opposite end continuing forever.
What is a ray?
300
A line segment that starts at point C and ends at point E.
What is line segment CE?
300
A triangle with no equal sides
What is a scalene triangle?
300
These shapes are different because they have a different number of sets of parallel sides. They are the same because they have no perpendicular sides.
What are a parallelogram and a trapezoid?
300
An angle larger than 90 degrees.
What is an obtuse angle?
300
An angle that makes a straight line.
What is a straight angle?
400
Lines that intersect or cross at right angles.
What are perpendicular lines?
400
A triangle with 3 acute angles.
What is an acute triangle?
400
A rectangle has two of these lines.
What is a line of symmetry?
400
An angle less than 90 degrees.
What is an acute angle?
400
A point where two or more straight lines meet.
What is a vertex?
500
Lines that are equal distances apart; they will never cross.
What are parallel lines?
500
A triangle with 2 acute angles and 1 obtuse angle.
What is an obtuse triangle?
500
A feature of this shape is all equal sides, two acute angles, and two sets of parallel sides.
What is a rhombus?
500
A feature of this shape is one right angle and two acute angles.
What is a right triangle?
500
When you can fold a shape into two parts, and they are exactly the same.
What are lines of symmetry?