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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