2D Polygons
Angles
Problems
Quadrilaterals
2D Geometry Terms
100
What shape has 4 vertices, 4 sides, and 2 pairs of parallel lines?
Rectangle
100
How much does a right angle measure?
90 degrees
100
The SIDE of a 2D polygon can also be called an ________.
edge
100
True or False: Some quadrilaterals can have 5 sides.
False
100
What does it mean for 2 shapes to be congruent?
They have to be the same SIZE and SHAPE.
200
What are any 4 sides polygon called?
Quadrilateral
200
What do you call an angle that is smaller than a right angle?
An acute angle.
200
I have 4 sides I have 2 pairs of parallel lines I have 4 right angles I have 2 lines of symmetry Who am I?
Rectangle
200
Name a quadrilateral with NO right angles.
Trapezoid OR rhombus
200
What does a line of symmetry do?
It splits (divides) a 2D polygon into 2 equal parts (in half).
300

What do you call a 10 sided polygon?

decagon

300
True or False: If an angle reads 120 degrees, it is considered an acute angle.
False --> Obtuse angle
300
Name 3 letters in the alphabet that has a line of symmetry.
A, E, T, I, D, B, H, M, X, ...
300
True or False: A hexagon is a quadrilateral.
False --> a hexagon has 6 sides
300
What makes 2 lines parallel?
They are straight lines, equal distance apart from each other and will never touch no matter how long they are.
400
What shape has 3 sides, 3 vertices, 1 line of symmetry and 2 sides that measure the same length?
Isosceles Triangle
400
What is the tool called to measure angles?
A Protractor
400
I have 4 sides I have no right angles I have 1 line of symmetry Who am I?
Trapezoid
400
How many pairs of parallel lines does a trapezoid have?
1 pair.
400
What are the 3 angles in an equilateral triangle? RIGHT, OBTUSE or ACUTE?
3 ACUTE angles
500
What is a shape called with 7 sides, 7 angles, and 7 vertices?
Heptagon
500
True or False: All quadrilaterals have 4 right angles.
False
500
How many lines of symmetry does a parallelogram have?
0 zero
500
Name 5 types of quadrilaterals.
Rhombus, Square, Rectangle, Trapezoid, Parallelogram
500
How is a REGULAR pentagon compare to an IRREGULAR pentagon (**hint think of lines of symmetry**)
A REGULAR pentagon will have 5 lines of symmetry, an IRREGULAR pentagon may not.
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