Figure 1 shows the cross section \(ABC \) of a metal cutter used for making biscuits. The straight sides \(AB \) and \(AC \) are both of length \(6cm \) and \(\angle BAC \) is \(1.2 \) radians. The curved portion \(BC\) is an arc of a circle with centre \(A\).
(a) Find the perimeter of the cross-section of the cutter.
\(P=\)\(cm\)
Correct
Incorrect
Question 2 of 3
2. Question
2 point(s)
(b) Find the area of cross section \(ABC\).
A pair of these cutters are kept together in a rectangular box of length \(a cm \) and width \(b cm\). The cutters fit into the box as shown in Figure 2.
\(ABC=\)\(cm^2\)
Correct
Incorrect
Question 3 of 3
3. Question
4 point(s)
(c) Find the value of \(a\) and the value of \(b\), giving your answer to \(3\) significant figures.