Advertisements
Advertisements
प्रश्न
Find the area of a triangle, whose sides are :
18 mm, 24 mm and 30 mm
Advertisements
उत्तर
Sides of ∆ are
a = 18 mm
b = 24 mm
c = 30 mm
S = `(a + b + c)/2 = (18 + 24 + 30)/2`
= `72/2 = 36`
area of Δ = `sqrt(S(S - a)(S - b)(S - c))`
= `sqrt(36(36 - 18)(36 - 24)(36 - 30))`
= `sqrt(36 xx 18 xx 12 xx 6)`
= `sqrt(18 xx 2 xx 18 xx 2 xx 6 xx 6)`
= `sqrt(18 xx 18 xx 2 xx 2 xx 6 xx 6)`
= `18 xx 2 xx 6 = 216 "mm"^2`
APPEARS IN
संबंधित प्रश्न
The length of the sides of a triangle are in the ratio 3: 4: 5. Find the area of the triangle if its perimeter is 144 cm.
The given figure shows a right-angled triangle ABC and an equilateral triangle BCD. Find the area of the shaded portion.
The perimeter of a triangle is 450 m and its side are in the ratio 12: 5: 13. Find the area of the triangle.
Find the area of a triangle, whose sides are :
10 cm, 24 cm, and 26 cm
One of the equal sides of an isosceles triangle is 13 cm and its perimeter is 50 cm. Find the area of the triangle.
The perimeter of a triangle is 72cm and its sides are in the ratio 3:4:5. Find its area and the length of the altitude corresponding to the longest side.
Find the area of a right angled triangle whose hypotenuse is 15cm and the base is 9cm.
The table given below contains some measures of the triangle. Find the unknown values.
| Side 1 | Side 2 | Side 3 | Perimeter |
| ? | 8 m | 3 m | 17 m |
Find the perimeter of the triangle, whose sides are 13 cm, 5 cm and 14 cm
In the following figures, perimeter of ΔABC = perimeter of ΔPQR. Find the area of ΔABC.
