Find the lateral of a cone with a radius of 7ft and a slant height of 13 ft use 3.14and round to the nearest tenth
439.6 ft^2
324.5 ft^2
571.5 ft^2
285.7 ft^2
571.5 ft^2
It is 285.7, rounded, and using 3.14 in place of Pi. Use the formula Pi OR 3.14 x r x l, Pi x radius (half of the given diameter) x slant height (the slanted length of the given cone)
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, you need to use the formula:
Lateral Area = π × radius × slant height
Given that the radius is 7 ft and the slant height is 13 ft, we can plug these values into the formula:
Lateral Area = 3.14 × 7 ft × 13 ft
Calculating this, we get:
Lateral Area = 287.26 ft^2
Rounding this value to the nearest tenth, we have:
Lateral Area ≈ 287.3 ft^2
Therefore, the closest answer choice is 285.7 ft^2.