Advertisements
Advertisements
प्रश्न
Calculate the area and the height of an equilateral triangle whose perimeter is 60 cm.
Advertisements
उत्तर
Each side of the triangle is `60/3` = 20 cm
Hence, the area of the equilateral triangle is given by
`A = sqrt(3)/4 xx 20^2`
= `sqrt(3)/4 xx 400`
= `100sqrt(3)`
= 173.2 cm2
The height h of the triangle is given by
`1/2 xx 20 xx h = 173.2`
h = 17.32 cm
APPEARS IN
संबंधित प्रश्न
Find the area of a triangle whose sides are 18 cm, 24 cm, and 30 cm. Also, find the length of altitude corresponding to the largest side of the triangle.
If the difference between the sides of a right-angled triangle is 3 cm and its area is 54 cm2; find its perimeter.
The base and the height of a triangle are in the ratio 4: 5. If the area of the triangle is 40 m2; find its base and height.
The area of an equilateral triangle is numerically equal to its perimeter. Find its perimeter correct to 2 decimal places.
Find the area of a triangle whose base is 3.8 cm and height is 2.8 cm.
The table given below contains some measures of the triangle. Find the unknown values.
| Side 1 | Side 2 | Side 3 | Perimeter |
| 11 feet | ? | 9 feet | 28 feet |
Find the perimeter and the area of a right angled triangle whose sides are 6 feet, 8 feet and 10 feet
Find the perimeter of An isosceles triangle with equal sides 10 cm each and third side is 7 cm
Find the perimeter of An equilateral triangle with side 6 cm
In the following figures, perimeter of ΔABC = perimeter of ΔPQR. Find the area of ΔABC.
