find the lateral area of a cone with a radius of 7ft and a slant height of 13 ft. use 3.14 for pie and round to the nearest tenth
Unit 2 lesson 8. 8th grade quiz
1. D
2. B
3. C
4. A
5. B
6. A
7. B
8. C
9. A
To find the lateral area of a cone, we need to calculate the area of the slanted surface.
The formula for the lateral area of a cone is given by: Lateral Area = π * r * l, where r is the radius and l is the slant height.
Given:
Radius (r) = 7 ft
Slant height (l) = 13 ft
π = 3.14
Substituting the given values into the formula, we can calculate the lateral area:
Lateral Area = 3.14 * 7 * 13 = 285.62 square feet
Rounding to the nearest tenth, the lateral area of the cone is approximately 285.6 square feet.
To find the lateral area of a cone, you need to use the formula:
Lateral Area = π * r * slant height
Given that the radius (r) of the cone is 7 ft and the slant height is 13 ft, you can substitute these values into the formula:
Lateral Area = 3.14 * 7 ft * 13 ft
Multiply 3.14 by 7 to get:
Lateral Area = 21.98 ft * 13 ft
Multiply 21.98 by 13 to get:
Lateral Area = 285.74 ft²
Rounding to the nearest tenth, the lateral area of the cone is approximately 285.7 ft².
Lateral area = 3.14 x 7 x 13 = 181.98 ft^2
Answer: 181.9 ft^2