Symmetry
This is when a figure can be folded into matching halves.
What is line of symmetry?
An angle less than 90° is called this.
What is an acute angle?
A full circle measures this many degrees.
What is 360°?
Lines that never meet are called this.
What are parallel lines?
A triangle with one right angle.
What is a right triangle?
How many lines of symmetry does a square have?
What is 4?
An angle that measures exactly 90°.
What is a right angle?
Half of a circle measures this many degrees.
What is 180°?
Lines that meet at a right angle are called this.
What are perpendicular lines?
A triangle with all angles less than 90°.
What is an acute triangle?
Name one shape that has exactly 1 line of symmetry.
What is a rectangle (or isosceles triangle)?
An angle greater than 90° but less than 180°.
What is an obtuse angle?
A right angle measures this many degrees.
What is 90°?
If two lines intersect to form 90°, they are…
What are perpendicular?
A triangle with one angle greater than 90°.
What is an obtuse triangle?
If a shape has no lines of symmetry, how is it described?
What is asymmetrical?
Classify a 120° angle.
What is an obtuse angle?
What fraction of a circle is 90°?
What is 1/4?
Name a pair of parallel sides in a rectangle.
Opposite sides (top & bottom or left & right)
How many angles does every triangle have?
What is 3?
Draw or describe all lines of symmetry in a rectangle.
What are 2 lines (horizontal and vertical)?
Classify a 45° angle.
What is an acute angle?
What fraction of a circle is 47°?
What is 47/360?
True or False: Parallel lines will eventually meet.
What is false?
The sum of angles in a triangle equals this.
What is 180°?