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Area, SM-Bank 032 MC

A flag consists of three different coloured sections: red, white and blue.

The flag is 3 m long and 2 m wide, as shown in the diagram below.
 

The blue section is an isosceles triangle that extends to half the length of the flag.

The area of the blue section, in square metres, is

  1.  1.5
  2.  2
  3.  3
  4.  6
Show Answers Only

\(A\)

Show Worked Solution

\(\text{Perpendicular height}\ \Delta=\dfrac{1}{2}\times 3=1.5\ \text{m}\)

\(\text{Area }\Delta\) \(=\dfrac{1}{2}\times bh\)
  \(=\dfrac{1}{2}\times 2\times 1.5\)
  \(= 1.5\ \text{m}^2\)

 
\(\Rightarrow A\)