A Triangle with Vertices at (X1, Y1), (X2, Y2), and (X3

question 135

Multiple Choice

A triangle with vertices at (x1, y1) , (x2, y2) , and (x3, y3) has area equal to the absolute value of D, where $$D = \frac { 1 } { 2 } \left| \begin{array} { l l l } x _ { 1 } & y _ { 1 } & 1 \\x _ { 2 } & y _ { 2 } & 1 \\x _ { 3 } & y _ { 3 } & 1\end{array} \right|$$ Find the area of the triangle having vertices at P, Q, and R.
- $$\mathrm { P } ( 0 , - 4 ) , \mathrm { Q } ( 0,2 ) , \mathrm { R } ( 6 , - 2 )$$

• A) 10
• B) 0
• C) 36
• D) 18

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Definitions:

Inheritance

The process by which genetic information is passed on from parents to their offspring, determining certain characteristics of the offspring.

Live-virus Vaccines

Vaccines that contain a version of the living virus that has been weakened so that it does not cause the disease in people with normal immune systems.

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Viruses that have been attenuated (reduced in virulence) for use in vaccines, allowing the immune system to develop immunity without causing the disease.

Immune Response

The body's defensive reaction to foreign substances or organisms, involving recognition and destruction.