Qardhaas

Qardhaas Waa mid kamid ah joometeriya afar xagal leh, afartiisa dhinacna ay isla egyihiiin, waxa uuna u egyahay laba saddax-xagal oo kala jeeda oo hal sal ka dhaxeeya

Qardhaas
Laba Qardhaas
Dhinacyada iyo Geesaha	4
sumad shalafli	{ } + { }
Sumada kokistar
Wandharan	D2 (*2)
Bed	$\tfrac{pq}{2}$
Xagasha gudaha (Darajada)	Afar xagal
Barbarrole	Laydi
Astaamaha	Qaabtuureed leh

Bedka

Bedka ama Badka Qardhaas waxaa loo xisaabi karaa afar qaab:

1. Barbaroolayaasha oo dhan, Waxa ay ka samaysmaan Salka $a$, Waxa ay la jaan qaadeeysaa dhinacyada iyo jooga $h$:

   $A = a \cdot h,$

2. Adigoo dhexroorka dheer ku dhifta $d_1$ Dhexroorka gaaban $d_2$ Oo aad markaas uqaybiso

   $\frac{\overline{AC} \cdot \overline{SB}}{2} = \frac{\overline{AC} \cdot \overline{BD}/2}{2} = \frac{\overline{AC} \cdot \overline{BD}}{4}$

   Adigoo laba laaba si aan u helno

   $A = {{d_1 \cdot d_2} \over {2}} = \frac{\overline{AC} \cdot \overline{BD}}{2},$

3. Adigoo ku dhufanaya goobada $p$ Gacanka $r$ Wareegeeda

   $4 \cdot \frac{a \cdot r}{2} = 2 \cdot a \cdot r = p \cdot r$.

   $A = p \cdot r,$

4. Ugudamayntii adigoo uxisaaba sida afar xafal $a$ Xaglaha gudaha adigoo isku dhufta

   ${a^2 \cdot \sin\alpha} = a \cdot (a \cdot \sin\alpha) = a \cdot h$

   $A = {a^2 \cdot \sin\alpha} = {a^2 \cdot \sin\beta}.$