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Study Guide for Module 5 DBA
1) What is a scale drawing?
a.
Tim has a scale model of an airplane which says it is in a 1:15 ratio. What does that
mean?
b.
If a scale factor is
than one, then the object will scale
to smaller dimensions
c.
If a scale factor is
than one, then the object will scale
to larger dimensions.
2) In a triangle, the sum of any two side lengths,
.
3) Can the following be lengths of the sides of a triangle? Why or why not?
a. 12, 15 , 3
b. 8 , 8, 5
4) Draw and define the following angles
a. Obtuse Angle
b.
Right Angle
c. Acute Angle
5) The sum of all the interior angles in a triangle is
degrees.

When the lengths of two sides and the angle between them is given, only
.
6) Can the following be angles of a triangle? Why or why not?
a. 20 °, 60°, 100°
b. 85° , 89° , 6°
7) Explain the difference between complementary and supplementary angles.
8) Draw and describe vertical angles. Where do you see those in the real world?

Vertical angles are always
9) A straight angle always measures
to each other.
degrees.
10) Adjacent angles are
11) Find the value of x for the following triangle below.
.
12) What is circumference?
13) What is the radius? What is the diameter? What is the relationship between the two?
14) This symbol π is called
and is approximately equal to
.
15) What are the two formulas for circumference? Are they the same? Explain why.
16) Calculate the circumference of a circle with diameter 8 feet. Show all work and add units!
17) What is the formula for the area of a circle?
18) Calculate the area of a circle with a diameter of 8 feet. Show all work and add units!
19) What is a cross section?
20) Draw an example of a rectangular prism and label the parts.

What does the cross section of a rectangular prism look like?
o Cross sections parallel to the base take the shape of the
o Cross sections perpendicular to the base take the shape of the
o Cross sections at a diagonal to the base make a
.
.
21) Sketch an example of a rectangular pyramid and label it's parts.

In a rectangular pyramid:
o Cross sections parallel to the base take the shape of
.
o Cross sections perpendicular to the base, through the top vertex, take the shape
of the
.
o Cross sections perpendicular to the base, not through the top vertex, take the
shape of
.
22) Describe the difference between pyramids and prims.
23) Figures that have the same shape and size are called
24) What is a trapezoid? Draw a sketch and label it's parts.
25) What parts can you break up trapezoids into?
26) Draw an example of a triangular prism and label the parts
27) A flat model that can be folded to make a solid shape is called a(n)
Extra help:
.
Name these shapes....
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