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29 Ιουν 2018 · 1 Answers. #1. +129845. +2. Where the two semi-circles intersect in the middle of the square, call this point E. Connect EC. Let the midpoint of DC be F. So FC and FE are radii of the top semi-circle = 4 cm. And FE is perpendicular to FC.
8 Φεβ 2024 · Free Online Scientific Notation Calculator. Solve advanced problems in Physics, Mathematics and Engineering.
16 Ιαν 2024 · A plane and a sphere intersect in a circle. The circle has an area of $14 \\pi$. The radius of the sphere is $10$ units. Find the surface area of the sphere.
11 Απρ 2018 · 3 Answers. #1. +129845. +1. Note that if the circumference of the larger circle is 10pi feet more....the track must be 5 feet wide. Proof....let the radius of the smaller circle = r. Then....let the radius of the larger circle be r + 5. So.... circumference of the smaller circle is 2pi * r. And the circumference of the larger circle is 2pi ( r ...
15 Αυγ 2017 · 4152. 3. Two circles are drawn below. The diameter of the smaller circle is a radius of the larger circle. What is the ratio of the smaller circle's circumference to the larger circle's circumference? Give your answer in fully simplified form. It should look like "x:y", where x and y are replaced by integers.
27 Δεκ 2014 · rosala Dec 27, 2014. #3. +8. Best Answer. Circumference of a circle = 2πr. So in order to find the circumference of this circle, we need to figure out what the radius is, which we can do by setting 49π equal to πr². 49π = πr². Like terms cancel, leaving us with: 49 = r².
3 Ιουλ 2022 · 1 Answers. #1. +2668. 0. Let r be the radius of the larger circle. Because the area is , the radius is 8. So, the area of the larger shaded region is half the circumference plus the diameter, which is . Now, note that the diameter of the smaller circle is the radius of the larger circle, so the radius of the smaller circle is .
11 Ιαν 2021 · We want the whole thing (everything inside the 10-inch radius), minus the smaller circle. Each circle has area A = π r², so: π (10)² - π (1)² = 99π in² and thier is two more ways to get 99π -hihihi . 😎😎😎
8 Απρ 2015 · The formula for the area of a circle is: A = πr². A semicircle is half of a circle, so its formula is: A = ½πr².---> 76.97 = ½πr². Multiply by 2: 153.94 = πr². Now, divide by pi, and find the square root ...
30 Ιουν 2018 · Geometry Question. 0. 1939. 1. The area of the semicircle in Figure A is half the area of the circle in Figure B. The area of a square inscribed in the semicircle, as shown, is what fraction of the area of a square inscribed in the circle? Express your answer as a common fraction. Guest Jun 30, 2018.
