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Given that $0<x<90$ and that $\tan 27^{\circ} \tan 33^{\circ} \tan 75^{\circ}= \tan x^{\circ}$

Find the value of $x$.

Two vertical poles stand $8.4\ \rm m$ apart. $AA'$ is $4.4\ \rm m$ high, $BB'$ is $3.1\ \rm m$ high. A point $P$ on the ground is defined to be …

In the figure, all circles are tangent to each other, as well as to the sides of the rectangle. The two red circles are congruent and the blue one is …

Given a 3-4-5 right triangle, find the radius of one of the four congruent circles as shown in the figure. If the radius is expressed as $\frac{p}{q}$, where $p$ and …

The series of figures above follow a certain pattern, find the percentage (%) of grey triangles to all triangles in Fig 250.

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