મહત્તમ દશાંશ સ્થાનો: 4; સૌથી નજીક; સરખા અંતરે શૂન્યથી દૂર
Leg a
3cm
Leg b
4cm
Hypotenuse c
5cm
Angle α
36.8699°
Angle β
53.1301°
પરિમિતિ
12cm
Height onto the hypotenuse
2.4cm
Inradius
1cm
Circumradius
2.5cm
Legs of 3 and 4 cm meet at the right angle; the hypotenuse is 5 cm, the acute angles are 36.8699° and 53.1301°, and the triangle encloses 6 cm².
Right triangle, to scale
ગણતરી કેવી રીતે થાય છે S
Hypotenuse (Pythagoras)
c=a2+b2=32+42=5cm
Angle α
α=arctanba=arctan43=36.869898∘
Area and perimeter
Area=21ab=21×3×4=6cm2,P=a+b+c=12cm
Height onto the hypotenuse, inradius, circumradius
h=cab=2.4cm,r=2a+b−c=1cm,R=2c=2.5cm
The circumcentre of a right triangle is the midpoint of its hypotenuse.
કાટકોણ ત્રિકોણ કેલ્ક્યુલેટર: કર્ણ, બાજુઓ અને ખૂણા વિશે
A right triangle is fixed by any two of its parts as long as one of them is a side. With both legs known, Pythagoras' theorem gives the hypotenuse c = √(a² + b²). With a side and an acute angle, the rest follows from sin α = a/c, cos α = b/c and tan α = a/b, and the two acute angles always add up to 90°.
The default legs of 3 cm and 4 cm make the 3-4-5 triangle: hypotenuse 5 cm, area 6 cm², perimeter 12 cm and angles of 36.8699° and 53.1301°. Builders use that ratio to square a corner, since marks 3 m and 4 m from it along two walls should be exactly 5 m apart. The results also include the height onto the hypotenuse (ab/c), the inradius ((a + b − c)/2) and the circumradius (c/2).
Angle α is opposite leg a and β is opposite leg b. Angles can be typed in degrees, radians, gradians or turns and must lie strictly between 0° and 90°.
ઉકેલેલાં ઉદાહરણો
Legs 3 and 4
I know
Both legs (a and b)
Leg a (opposite α)
3 cm
Leg b (opposite β)
4 cm
પરિણામનું એકમ
સેન્ટિમીટર (cm)
Hypotenuse c
5 cm
ક્ષેત્રફળ
6 cm²
Angle α
36.869898 °
Angle β
53.130102 °
Height onto the hypotenuse
2.4 cm
Inradius
1 cm
Circumradius
2.5 cm
પરિમિતિ
12 cm
ચકાસણીનો સ્ત્રોત: 3-4-5 triple; h = 3·4/5; r = (3 + 4 − 5)/2; Python 3.8 math: degrees(atan(3/4))
ચકાસણીનો સ્ત્રોત: Side opposite 30° is half the hypotenuse; Python 3.8 math: 10*cos(radians(30)), 25*sqrt(3)/2
45° angle gives equal legs (edge case)
I know
Leg a and angle α
Leg a (opposite α)
7 cm
Angle α
45 °
પરિણામનું એકમ
સેન્ટિમીટર (cm)
Leg b
7 cm
Hypotenuse c
9.899495 cm
ક્ષેત્રફળ
24.5 cm²
Angle β
45 °
ચકાસણીનો સ્ત્રોત: tan 45° = 1 so b = a; Python 3.8 math: 7*sqrt(2)
પ્રશ્નો
How do you find the hypotenuse of a right triangle?
Square both legs, add them and take the square root: c = √(a² + b²). Legs of 3 and 4 give √25 = 5, and legs of 6 in and 8 in give 10 in. If you know one leg and the angle opposite it instead, divide by the sine: c = a / sin α, so a 5 cm leg opposite 30° means a 10 cm hypotenuse.
How do you find a missing side of a right triangle?
For a missing leg, subtract the squares: b = √(c² − a²). A hypotenuse of 13 and a leg of 5 give √(169 − 25) = 12. The hypotenuse must be longer than either leg, or no right triangle exists. With one side and an angle, use SOHCAHTOA: opposite = hypotenuse × sin α and adjacent = hypotenuse × cos α.
What are the side ratios of a 30-60-90 and a 45-45-90 triangle?
A 30-60-90 triangle has sides in the ratio 1 : √3 : 2, so the side opposite 30° is half the hypotenuse; a hypotenuse of 10 gives legs of 5 and 8.6603. A 45-45-90 triangle has equal legs and a hypotenuse √2 ≈ 1.4142 times a leg, so legs of 7 give a hypotenuse of 9.8995.
What does SOHCAHTOA mean?
It is a memory aid for the three trigonometric ratios in a right triangle: sine = opposite/hypotenuse, cosine = adjacent/hypotenuse, tangent = opposite/adjacent. In the 3-4-5 triangle, the angle opposite the side of 3 has sin = 0.6, cos = 0.8 and tan = 0.75, and each inverse function returns the same 36.87°.
How do you check a corner is square with the 3-4-5 rule?
Mark 3 units along one side and 4 along the other, measured from the corner; the diagonal between the marks is exactly 5 when the angle is 90°. A longer diagonal means the angle is too wide: 5.05 m on 3 m and 4 m legs is 91.2°, and 4.95 m is 88.8°. Multiples such as 6-8-10 or 9-12-15 give a more precise check on large slabs.
“કાટકોણ ત્રિકોણ કેલ્ક્યુલેટર: કર્ણ, બાજુઓ અને ખૂણા” કેટલું ચોક્કસ છે?
ચોકસાઈ તમારા ઇનપુટ અને પદ્ધતિની ધારણાઓ પર આધારિત છે. દશાંશ ગણતરી 50 સાર્થક અંકો વાપરે છે, પરંતુ અંદાજ, સંખ્યાત્મક પદ્ધતિઓ અને મૂળ ડેટા ઓછા ચોક્કસ હોઈ શકે છે; દર્શાવેલા મૂલ્યોને રાઉન્ડ કરવાથી આ મર્યાદાઓ દૂર થતી નથી. સ્વતંત્ર સ્ત્રોતોના ઉકેલેલા ઉદાહરણો સાથે ચકાસણી: 6. ઉદાહરણ તરીકે, “Legs 3 and 4”ને 3-4-5 triple; h = 3·4/5; r = (3 + 4 − 5)/2; Python 3.8 math: degrees(atan(3/4)) સાથે ચકાસવામાં આવે છે.
આ પદ્ધતિનો સ્ત્રોત શું છે?
Euclid, Elements, Book I, Proposition 47 (Pythagorean theorem); OpenStax Precalculus 2e, §5.4 Right Triangle Trigonometry.