In the following figure: 
are parallel and ?DEF is an isosceles triangle.
(a) List two supplementary angles.
(b) What shape is ABDEGHA?
(c) What is the measure of ?DFG?
(d) What is the measure of ?BAH?
(e) How many obtuse interior angles are in the figure? List the angle names and measures.
(f) List one set of vertices that form a pentagon.
(g) List two sets of vertices that form scalene triangles
(h) Which angles are congruent? List all congruent angle sets.
(a) ?CHD & ?GHD,?CHD &?AHC,?AHC &?AHG,?AHG & ?DHG
(b) A hexagon
(c) 127°
(d) 41°
(e) ?AHC = 102°,?GHD = 102° and ?BCH = 152°
(f) Example:ABDEGA
(g) Example:AHG and GHE
(h) ?DFE and ?DEF,?DHG and ?CHA,?CHD and ?AHG
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Solve the initial value problem.Differential Equation: 
= -3ti + 7tj + 9tkInitial Condition: r(0) = -3i + 3k
A. r(t) = 
i + 
t2j - 
k
B. r(t) = 
i + 
t2j + 
k
C. r(t) = (-3t2 - 6)i + 7t2j + (9t2 + 6)k
D. r(t) = 
i + 
t2j + 
k
Write the expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression.(1 + cot ?)(1 - cot ?) - csc2 ?
A. 0 B. -2 cot2 ? C. 2 cot2 ? D. 2
Solve the problem.The revenue for a small company is given by the quadratic function 
where t is the number of years since 1998 and r(t) is in thousands of dollars. If this trend continues, find the year after 1998 in which the company's revenue will be $2185 thousand. Round to the nearest whole year.
A. 2009 B. 2011 C. 2010 D. 2020
Find the derivative of the function.y = 
A. y' = 
B. y' = 
C. y' = 
D. y' = 