Download Unit 2 Study Guide

Unit 1 Study Guide
I.
Name _________________________
Know these vocabulary words.
line – a straight path that goes on and on in both directions
line segment – a straight path that has two endpoints
ray – a straight path that has one endpoint and goes on and on in the other direction
angle – two rays or two line segments that have the same endpoint (vertex)
polygon – a closed figure made up of line segments
quadrangle – a four-sided polygon
II.
Be able to identify, draw, and label line segments, lines, and rays. Be able to
draw and label parallel and intersecting line segments.
A
B
=> line segment AB… AB or BA
=> line CD… CD or DC
C
D
=> ray EF … EF
E
F
parallel line segments
intersecting line segments
Try it:
1. Draw VW intersecting YZ.
2. Name the following figure in two ways. _________
S
III.
_________
T
Be able to draw and identify quadrangles.
A square has four sides of equal length and four right angles.
A rhombus has four sides of equal length but no right angles.
A rectangle has two pair of opposite sides the same length and four right angles.
A parallelogram has two pair of opposite sides the same length and no right angles.
A trapezoid has one pair of opposite parallel sides.
Try it:
Draw a quadrangle that has four sides of the same length but is not a square.
What kind of quadrangle is that? ____________________________
What is another way to classify the polygon? _______________________
IV.
Be able to identify properties of polygons.
 A polygon is made up of line segments; curved lines are not line segments.
 The sides of a polygon must form one closed path.
 The sides of a polygon must not cross.
 A polygon can have only one interior.
 The number of sides is the same as the number of angles and vertices.
 A polygon must have at least three sides.
This is a polygon:
This is NOT a polygon…
because it has curved lines.
This is a polygon:
This is NOT a polygon…
because it is an open figure.
This is a polygon.
This is NOT a polygon…
because it has more than one interior.
V.
Practice mental math.
=>Knowing your basic facts can help you add and subtract numbers mentally.
Example:
5 + 7 = 12
50 + 70 = ??
Think: If 5 ones + 7 ones = 12 ones
Then 5 tens + 7 tens = 12 tens (which equals 120)
Example 2: 16-8 = 8
160 – 80 = ??
Think: If 16 ones – 8 ones is 8 ones,
Then 16 tens – 8 tens is 8 tens (or 80)
Solve these problems mentally.
1. 3 + 9 = _____
2. 30 + 90 = ______
3. 16 – 7 = _____
4. 160 – 70 = ______