IB MAI HL Geometry & Trigonometry Topic 3.2 Trigonometry (id: 73e2cab97)

本题目来源于试卷: IB MAI HL Geometry & Trigonometry Topic 3.2 Trigonometry，类别为 IB数学

[填空题]
During a hiking trip, Jim,2-yhyn,hni t3 hl quwp;:r9/ po3 wqh h4h6su bn4v4oq7eyu8 stopped and checked his compass for directions. The compass8eyh4u4 h qs6v7obn4u has a circular face with centre at O and the diameter of 20 cm. The needle of the compass is at an angle of $\theta$ to the East of North, covering an arc length of $l$, as illustrated in the diagram below.

1.Determine the circumference of the face of the compass.  cm
2.Using the diagram, write down the size of the angle $\theta$ in degrees.  $^{\circ}$
3.Calculate the arc length, $l$.  cm
4.Calculate the total area of the shaded sectors on the diagram.  $cm^2$

参考答案:
空格1: 62.8±3%  空格2: 50  空格3: 8.73±3%  空格4: 87.3±3% 


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