Question Number 188267 by normans last updated on 27/Feb/23 Answered by mr W last updated on 02/Mar/23 Commented by mr W last updated on 02/Mar/23…
Question Number 57186 by Tawa1 last updated on 31/Mar/19 Commented by kaivan.ahmadi last updated on 31/Mar/19 $$\begin{vmatrix}{\mathrm{1}\:\:\:\:\:\:\:\:\:\mathrm{1}\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{1}}\\{{a}\:\:\:\:\:\:\:\:\:\:{b}\:\:\:\:\:\:\:\:\:\:\:{c}}\\{{a}^{\mathrm{2}} \:\:\:\:\:\:\:\:{b}^{\mathrm{2}} \:\:\:\:\:\:{c}^{\mathrm{2}} }\end{vmatrix}\underset{−{a}^{\mathrm{2}} {R}_{\mathrm{1}} +{R}_{\mathrm{3}} } {\overset{−{aR}_{\mathrm{1}} +{R}_{\mathrm{2}}…
Question Number 188239 by BaliramKumar last updated on 26/Feb/23 $$ \\ $$The perimeter of a triangle is 16 units. How many triangles with integer sides…
Question Number 188208 by Rupesh123 last updated on 26/Feb/23 Answered by a.lgnaoui last updated on 26/Feb/23 $$\measuredangle{ADB}=\mathrm{150}\:\:\Rightarrow\measuredangle{BCD}=\mathrm{30}\:\:\measuredangle{C}=\mathrm{120} \\ $$$$\bigtriangleup{ABC}\:\:\:\frac{\mathrm{sin}\:\mathrm{20}}{\mathrm{8}}=\frac{\mathrm{sin}\:\mathrm{60}}{{x}+{CD}}\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{1}\right) \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{CD}=\frac{\mathrm{8sin}\:\mathrm{60}}{\mathrm{sin}\:\mathrm{20}}−{x}\:\:\:\:\:\:\:\left(\mathrm{2}\right) \\ $$$$\bigtriangleup{BCD}\:\:\:\:\frac{\mathrm{sin}\:\mathrm{50}}{{CD}}=\frac{\mathrm{sin}\:\mathrm{30}}{\mathrm{8}}\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{3}\right) \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{CD}=\frac{\:\mathrm{8sin}\:\mathrm{50}}{\mathrm{sin}\:\mathrm{30}}\:\:\:\:\:\left(\mathrm{4}\right)\:\:\:\:\:\:\:…
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Question Number 188163 by normans last updated on 26/Feb/23 Commented by mr W last updated on 26/Feb/23 $${is}\:{it}\:{really}\:{a}\:{square}? \\ $$ Commented by normans last updated…
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Question Number 188155 by normans last updated on 26/Feb/23 Answered by HeferH last updated on 26/Feb/23 Commented by HeferH last updated on 26/Feb/23 $$\:\frac{{a}}{{b}}\:=\:\frac{\mathrm{180}}{{k}\:+\:\mathrm{64}} \\…
Question Number 188147 by normans last updated on 26/Feb/23 Answered by Rasheed.Sindhi last updated on 26/Feb/23 $$\mathrm{5}\:\mid\:{ABC}\:\Rightarrow{C}=\mathrm{0}\:{or}\:\mathrm{5} \\ $$$${C}=\mathrm{0}\Rightarrow{D}=\mathrm{0},\mathrm{4},\mathrm{8}\:\:\left[\because\:\mathrm{4}\mid{ABCD}\right] \\ $$$${C}=\mathrm{5}\Rightarrow{D}=\mathrm{2},\mathrm{6}\:\:\:\:\:\:\left[\because\:\mathrm{4}\mid{ABCD}\right] \\ $$$${CD}=\mathrm{00},\mathrm{04},\mathrm{08},\mathrm{52},\mathrm{56} \\ $$$${BCD}=\mathrm{000},\mathrm{900},\mathrm{504},\mathrm{108},\mathrm{252},\mathrm{756}\:\:\left[\because\mathrm{9}\mid{BCD}\right]…
Question Number 188119 by mr W last updated on 25/Feb/23 Commented by mr W last updated on 26/Feb/23 $${other}\:{forms}\:{of}\:{Heron}'{s}\:{formua}. \\ $$$${maybe}\:{one}\:{day}\:{you}\:{may}\:{use}\:{them}. \\ $$ Answered by…