Answer:
Step-by-step explanation:
The surface area of a cylinder is given as 
We have that the radius of the box is 
inches.
The height of the gift box is three times the radius.
We substitute into the formula to get:
We simplify the last parenthesis to get:
We expand the last two binomial factors to get:
We expand further to get:
Once you know the height and width, multiply them to get the area of the square.<span> To </span>find<span> the perimeter of the square, add all four sides </span>together. <span>To </span>find the area of a triangle<span>, multiply </span>together<span> two of the sides not the hypotenuse and then multiply that figure by 1/2.</span>
Answer: 24cm
Step-by-step explanation:
Inradius = r
c = the hypothenuse
a & b = the other 2 sides of the triangle
Inradius formula: r = 1/2 * (a+b-c)
Plug in what we know.
2 = 1/2 * (a+b-10)
Multiply both sides by 2.
2*2 = 1/2 * (a+b-10) * 2
4 = a+b-10
Add 10 to both sides.
4+10 = a+b-10+10
14 = a+b
Perimeter formula: P=a+b+c
Plug in what we know
(remember a+b=14).
P=14 + 10
P = 24
The radius is 2.59 which rounded to the nearest tenth it would be 2.6.
