Webanswer (1 of 4): perimeter= 42 length= x+4 let width= w 2(x+4+w)= 42 x+4+w= 21 w= 21-x-4= 17-x area= (x+4)(17-x)= 17x-x^2+68–4x= 13x-x^2–68 in my opinion, the ... WebAug 13, 2024 · Perimeter = 4 × Length of the curtain. 42.5 feet = 4 × Length of the curtain. Length of the curtain = (42.5 feet)/4 = 10.625 feet. The length of the curtain = 10.625 feet. thanks Advertisement Advertisement New questions in Mathematics. What is the area of the rhombus? 15.75 cm2 31.5 cm2 124 cm2 248 cm2
Finding perimeter when a side length is missing - Khan Academy
WebThe formula for the perimeter of a sector is 2 x radius + radius x angle x (π / 360). Visual on the figure below: A sector is just a part of a circle, so the formula is similar. The added complexity comes from the need to calculate how much of a circle a sector accounts for. Volume of a sphere. To find the volume of a sphere, use the formula 4/3 x π x … Surface area of a sphere. The surface area formula for a sphere is 4 x π x (diameter / … Perimeter of a square formula; How to calculate the perimeter of a square? … Example: find the perimeter of a rectangle. Say there is a rectangular garden and a … Examples: find the perimeter of a triangle. Example 1: In the simplest scenario one … An easy to use area of a triangle calculator, which supports the basic height times … WebPerimeter is the distance around a two-dimensional shape. Example: the perimeter of this rectangle is 7+3+7+3 = 20. Example: the perimeter of this regular pentagon is: 3+3+3+3+3 … bobobird tracking
Find perimeter by counting unit squares (article) Khan Academy
WebExample 4 (from the last class): We are given an isosceles triangle with a 12-foot perimeter P. To find the maximum area A of the isosceles triangle. Solution: Let x be the base, h the height, and y the length of the two equal-length sides. Then P = x + 2 y = 12, so y = 6-1 2 x. Next, A = 1 2 xh. WebAnswer (1 of 4): This is rather easy, if you understand that a square has 4 sides of equal lengths, all at a 90 degrees angle from each other. Using this, we can see that the … WebIn other words Perimeter of semicircle = (pi*d) ÷ 2. If you now want to calculate the perimeter of the semicircle and the triangle together, then all you have left to do is to add … clip auf youtube