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Find a degree 
Magazine Problem 13
Find the area of the polygon with the given vertices. (See Example 3. ) $$\mathrm{E}(3,1), \mathrm{F}(3,-2), \mathrm{G}(-2,-2)$$
Problem 14
Find the area of the polygon with the given vertices. (See Example 3. ) $$\mathrm{J}(-3,4), \mathrm{K}(4,4), \mathrm{L}(3,-3)$$
Problem 14
In Exercises \(9-14,\) plot the points in a coordinate plane. Then determine whether \(\overline{\mathrm{AB}}\) and \(\overline{\mathrm{CD}}\) are congruent. (See Example 2.) $$ A(10,-4), B(3,-4), C(-1,2), D(-1,5) $$
Problem 15
In Exercises \(15-18\) , the endpoints of \(\overline{\mathrm{CD}}\) are given. Find the coordinates of the midpoint \(\mathrm{M}\) . (See Example 3.) $$ \mathrm{C}(3,-5) \text { and } \mathrm{D}(7,9) $$
Problem 15
Find the area of the polygon with the given vertices. (See Example 3. ) $$\mathrm{W}(0,0), \mathrm{X}(0,3), \mathrm{Y}(-3,3), \mathrm{Z}(-3,0)$$
Problem 16
Find the area of the polygon with the given vertices. (See Example 3. ) $$\mathrm{N}(-2,1), \mathrm{P}(3,1), \mathrm{Q}(3,-1), \mathrm{R}(-2,-1)$$
Problem 16
In Exercises \(15-18\) , the endpoints of \(\overline{\mathrm{CD}}\) are given. Find the coordinates of the midpoint \(\mathrm{M}\) . (See Example 3.) $$ C(-4,7) \text { and } D(0,-3) $$
Problem 17
In Exercises \(15-18\) , the endpoints of \(\overline{\mathrm{CD}}\) are given. Find the coordinates of the midpoint \(\mathrm{M}\) . (See Example 3.) $$ \mathrm{C}(-2,0) \text { and } \mathrm{D}(4,9) $$
Problem 17
In Exercises \(17-24,\) sketch the figure described. plane \(\mathrm{P}\) and line \(\ell\) intersecting at one point
Problem 18
In Exercises \(15-18\) , the endpoints of \(\overline{\mathrm{CD}}\) are given. Find the coordinates of the midpoint \(\mathrm{M}\) . (See Example 3.) $$ C(-8,-6) \text { and } D(-4,10) $$
