زیادہ سے زیادہ اعشاری مقامات: 4؛ قریب ترین؛ برابر فاصلے پر صفر سے دور
Leg a
3cm
Leg b
4cm
Hypotenuse c
5cm
Angle α
36.8699°
Angle β
53.1301°
محیط
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
حساب کا طریقہ 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.
قائمہ مثلث کیلکولیٹر: وتر، اضلاع اور زاویے کے بارے میں
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°.
حل شدہ مثالیں
Legs 3 and 4
I know
Both legs (a and b)
Leg a (opposite α)
3 cm
Leg b (opposite β)
4 cm
نتائج کی اکائی
سینٹی میٹر (cm)
Hypotenuse c
5 cm
رقبہ
6 cm²
Angle α
36.869898 °
Angle β
53.130102 °
Height onto the hypotenuse
2.4 cm
Inradius
1 cm
Circumradius
2.5 cm
محیط
12 cm
جانچ کا ماخذ: 3-4-5 triple; h = 3·4/5; r = (3 + 4 − 5)/2; Python 3.8 math: degrees(atan(3/4))
Leg 5 and hypotenuse 13
I know
Leg a and hypotenuse c
Leg a (opposite α)
5 cm
Hypotenuse c
13 cm
نتائج کی اکائی
سینٹی میٹر (cm)
Leg b
12 cm
رقبہ
30 cm²
محیط
30 cm
Angle α
22.619865 °
جانچ کا ماخذ: 5-12-13 triple; Python 3.8 math: degrees(asin(5/13))
30-60-90 from hypotenuse 10 and α = 30°
I know
Hypotenuse c and angle α
Hypotenuse c
10 cm
Angle α
30 °
نتائج کی اکائی
سینٹی میٹر (cm)
Leg a
5 cm
Leg b
8.660254 cm
Angle β
60 °
رقبہ
21.650635 cm²
جانچ کا ماخذ: 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 °
نتائج کی اکائی
سینٹی میٹر (cm)
Leg b
7 cm
Hypotenuse c
9.899495 cm
رقبہ
24.5 cm²
Angle β
45 °
جانچ کا ماخذ: tan 45° = 1 so b = a; Python 3.8 math: 7*sqrt(2)
سوالات
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.
“قائمہ مثلث کیلکولیٹر: وتر، اضلاع اور زاویے” کتنا درست ہے؟
درستی آپ کی درج کردہ قدروں اور طریقے کے مفروضوں پر منحصر ہے۔ اعشاری حساب 50 بامعنی ہندسے استعمال کرتا ہے، مگر تخمینے، عددی طریقے اور ماخذ کا ڈیٹا کم درست ہو سکتے ہیں؛ دکھائی گئی قدروں کو راؤنڈ کرنے سے یہ حدود ختم نہیں ہوتیں۔ آزاد ذرائع کی حل شدہ مثالوں سے جانچ: 6۔ مثلاً، “Legs 3 and 4” کو 3-4-5 triple; h = 3·4/5; r = (3 + 4 − 5)/2; Python 3.8 math: degrees(atan(3/4)) سے جانچا جاتا ہے۔
اس طریقے کا ماخذ کیا ہے؟
Euclid, Elements, Book I, Proposition 47 (Pythagorean theorem); OpenStax Precalculus 2e, §5.4 Right Triangle Trigonometry.