The diagram shows a playground $ABCD$. $AB$ is perpendicular to $BD$, $BD=50$ m, $CD=25$ m

Question

The diagram shows a playground $ABCD$. $AB$ is perpendicular to $BD$, $BD=50$ m, $CD=25$ m and $\angle BDC=140{}^\circ$. Calculate the $\angle ADB$. Calculate the length of $AD$. Calculate the area of triangle $BCD$. A girl, on the seesaw, was looking at an apple. Find her angle of elevation.

Accepted Answer

(i) $40^\circ$ (ii) $65.3\text{ m}$ (iii) $402\text{ m}^2$ (iv) $5.7^\circ$

Trigonometry in Motion: Analyzing Plane Geometry and Seesaw Elevations

Trigonometry in Motion: Analyzing Plane Geometry and Seesaw Elevations

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