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
Bedka
Bedka ama Badka Qardhaas waxaa loo xisaabi karaa afar qaab:
Barbaroolayaasha oo dhan, Waxa ay ka samaysmaan Salka
a
{\displaystyle a}
, Waxa ay la jaan qaadeeysaa dhinacyada iyo jooga
h
{\displaystyle h}
:
A
=
a
⋅
h
,
{\displaystyle A=a\cdot h,}
Adigoo dhexroorka dheer ku dhifta
d
1
{\displaystyle d_{1}
Dhexroorka gaaban
d
2
{\displaystyle d_{2}
Oo aad markaas uqaybiso
A
C
¯
⋅
S
B
¯
2
=
A
C
¯
⋅
B
D
¯
/
2
2
=
A
C
¯
⋅
B
D
¯
4
{\displaystyle {\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
⋅
d
2
2
=
A
C
¯
⋅
B
D
¯
2
,
{\displaystyle A={d_{1}\cdot d_{2} \over {2}={\frac {\overline {AC}\cdot {\overline {BD}{2},}
Adigoo ku dhufanaya goobada
p
{\displaystyle p}
Gacanka
r
{\displaystyle r}
Wareegeeda
4
⋅
a
⋅
r
2
=
2
⋅
a
⋅
r
=
p
⋅
r
{\displaystyle 4\cdot {\frac {a\cdot r}{2}=2\cdot a\cdot r=p\cdot r}
.
A
=
p
⋅
r
,
{\displaystyle A=p\cdot r,}
Ugudamayntii adigoo uxisaaba sida afar xafal
a
{\displaystyle a}
Xaglaha gudaha adigoo isku dhufta
a
2
⋅
sin
α
=
a
⋅
(
a
⋅
sin
α
)
=
a
⋅
h
{\displaystyle {a^{2}\cdot \sin \alpha }=a\cdot (a\cdot \sin \alpha )=a\cdot h}
A
=
a
2
⋅
sin
α
=
a
2
⋅
sin
β
.
{\displaystyle A={a^{2}\cdot \sin \alpha }={a^{2}\cdot \sin \beta }.}
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