how do i find the lateral height

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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how do i find the lateral height
**Calculating the Surface Area of a Right Circular Cone**

This educational resource explains how to calculate the surface area of a right circular cone given its dimensions.

### Diagram Explanation:

The diagram provided represents a right circular cone with the following dimensions:
- The height (h) of the cone is 4 inches.
- The radius (r) of the base of the cone is 6 inches. 

### Steps to Calculate the Surface Area:

The surface area of a right circular cone consists of two parts:
1. **Lateral Surface Area (LSA)**: The area of the cone's slanted surface.
2. **Base Surface Area (BSA)**: The area of the cone's circular base.

#### 1. Lateral Surface Area (LSA):
To calculate the Lateral Surface Area, we use the formula:
\[ \text{LSA} = \pi r l \]
where \( l \) is the slant height of the cone.

To find the slant height \( l \), we use the Pythagorean theorem:
\[ l = \sqrt{r^2 + h^2} \]

Substituting the given dimensions:
\[ l = \sqrt{6^2 + 4^2} \]
\[ l = \sqrt{36 + 16} \]
\[ l = \sqrt{52} \]
\[ l \approx 7.21 \, \text{inches} \]

Now, calculating the LSA:
\[ \text{LSA} = \pi \cdot 6 \cdot 7.21 \]
\[ \text{LSA} \approx 135.78 \, \text{in}^2 \]

#### 2. Base Surface Area (BSA):
To calculate the Base Surface Area, we use the formula:
\[ \text{BSA} = \pi r^2 \]

Substituting the given dimensions:
\[ \text{BSA} = \pi \cdot 6^2 \]
\[ \text{BSA} = \pi \cdot 36 \]
\[ \text{BSA} \approx 113.1 \, \text{in}^2 \]

### Total Surface Area (TSA):
The total surface area of the cone is the sum of the lateral and base surface areas:
\[ \text{TSA} = \text{LSA} + \text{
Transcribed Image Text:**Calculating the Surface Area of a Right Circular Cone** This educational resource explains how to calculate the surface area of a right circular cone given its dimensions. ### Diagram Explanation: The diagram provided represents a right circular cone with the following dimensions: - The height (h) of the cone is 4 inches. - The radius (r) of the base of the cone is 6 inches. ### Steps to Calculate the Surface Area: The surface area of a right circular cone consists of two parts: 1. **Lateral Surface Area (LSA)**: The area of the cone's slanted surface. 2. **Base Surface Area (BSA)**: The area of the cone's circular base. #### 1. Lateral Surface Area (LSA): To calculate the Lateral Surface Area, we use the formula: \[ \text{LSA} = \pi r l \] where \( l \) is the slant height of the cone. To find the slant height \( l \), we use the Pythagorean theorem: \[ l = \sqrt{r^2 + h^2} \] Substituting the given dimensions: \[ l = \sqrt{6^2 + 4^2} \] \[ l = \sqrt{36 + 16} \] \[ l = \sqrt{52} \] \[ l \approx 7.21 \, \text{inches} \] Now, calculating the LSA: \[ \text{LSA} = \pi \cdot 6 \cdot 7.21 \] \[ \text{LSA} \approx 135.78 \, \text{in}^2 \] #### 2. Base Surface Area (BSA): To calculate the Base Surface Area, we use the formula: \[ \text{BSA} = \pi r^2 \] Substituting the given dimensions: \[ \text{BSA} = \pi \cdot 6^2 \] \[ \text{BSA} = \pi \cdot 36 \] \[ \text{BSA} \approx 113.1 \, \text{in}^2 \] ### Total Surface Area (TSA): The total surface area of the cone is the sum of the lateral and base surface areas: \[ \text{TSA} = \text{LSA} + \text{
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