__ Cone Blanket Area Formula__ – Of course you often see or encounter objects that are shaped like cones. Farmers hats, rice cones, or birthday hats are examples of conical objects. Because it has been discussed before

**The formula for finding the volume of a cone with examples of the problem**then this time the material that will be given by

**basic math formula**is about how to calculate and find the area of the blanket from the shape of a conic space. If you notice, a cone has a wedge (bottom) side that is circular. While the part that forms an acute angle is a curved area known as a conical blanket. So, a cone has two sides, the first side is the wedge side while the second side is the blanket side. See the following image:

In the cone image above the height of the cone is denoted by the letter **t**, characters **r** is the radius of the cone, while the character **s** is a painter’s line.

## Formulas for Calculating the Area of a Cone Blanket Example Problems and Discussion

If a cone is cut by following the painter’s line, it will form a net of cones like this:

Also read: How to calculate the formula for the volume of a cylinder (cylinder)

Take a look at the picture above. The area of the cone is the result of the sum of the area of A and the area of CBB. Well, to find out the surface area of a cone, you must first find out the area of the blanket. The area of a conical blanket can be found using the following formula:

**Area of blanket of cone = sr**

**= 22/7 = 3.14**

**s = length of the painter’s line**

**r = radius**

Let’s look at the reference to the use of this formula in answering the following questions:

**Example question 1**

It is known that a cone has a radius of 3 cm and the length of the painter’s line is 5 cm. Then determine:

A. the height of the cone

B. volume of cone

C. the area of the cone blanket

D) the surface area of the cone

**How to answer:**

A. Height of cone

To find the height of the cone, we can use the Pythagorean formula like this:

t2 = s^{2} – r^{2}t2 = 5^{2} – 3^{2}t2 = 25 – 9

t2 = 16

t = 16 = 4cm

B. Volume of cone

V = 1/3 r^{2} t

V = 1/3 x 3.14 x 3 x 3 x 4

V = 3.768 cm^{3}

c. Cone blanket area

L = rs

L = 3.14 x 3 x 5

L = 471 cm^{2}

D. Surface area of the cone

L = r(s + r)

L = 3.14 x 3 (5+3)

L = 3.14 x 3 x 8 = 75.36 cm^{2}

Well, that’s roughly the formula and method that you can use to find the area of a conical blanket. Study the reference questions given carefully and slowly. Hopefully it can make it easier for you to be able to understand math lesson material about * The formula for finding the area of a cone blanket *what your teacher taught you at school.