![If a : b = c : d , then prove that (a +b)/(a - b) = sqrt(ac + ad + bc + bd )/sqrt(ac - ad - bc + bd). If a : b = c : d , then prove that (a +b)/(a - b) = sqrt(ac + ad + bc + bd )/sqrt(ac - ad - bc + bd).](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/1410325_web.png)
If a : b = c : d , then prove that (a +b)/(a - b) = sqrt(ac + ad + bc + bd )/sqrt(ac - ad - bc + bd).
![geometry - In the following diagram of a triangle, AB = BC = CD and AD = BD. Find the measure of angle D. - Mathematics Stack Exchange geometry - In the following diagram of a triangle, AB = BC = CD and AD = BD. Find the measure of angle D. - Mathematics Stack Exchange](https://i.stack.imgur.com/wEb4F.png)
geometry - In the following diagram of a triangle, AB = BC = CD and AD = BD. Find the measure of angle D. - Mathematics Stack Exchange
![The semi-lattice X ¼ fa, b, c, d, ab, ac, ad, bc, bd, cd, abc, abd,... | Download Scientific Diagram The semi-lattice X ¼ fa, b, c, d, ab, ac, ad, bc, bd, cd, abc, abd,... | Download Scientific Diagram](https://www.researchgate.net/profile/David-Barner/publication/30950104/figure/fig2/AS:667818035015680@1536231635084/The-semi-lattice-X-14-fa-b-c-d-ab-ac-ad-bc-bd-cd-abc-abd-acd-bcd-abcdg-Note_Q320.jpg)
The semi-lattice X ¼ fa, b, c, d, ab, ac, ad, bc, bd, cd, abc, abd,... | Download Scientific Diagram
![ABC is an isosceles triangle in which AC BC AD and BE are respectively two altitudes to sides BC and... ABC is an isosceles triangle in which AC BC AD and BE are respectively two altitudes to sides BC and...](https://d39460vivz6red.cloudfront.net/questions/m-bb-ncertexemplar9-chp7-ex4-q9/images/1_1599029542931.png)
ABC is an isosceles triangle in which AC BC AD and BE are respectively two altitudes to sides BC and...
![In a ABC, D and E are points on the sides AB and AC respectively such that DE∥ BC . If AD = 2.4 cm, AE = 3.2 cm, DE ∥ BC . In a ABC, D and E are points on the sides AB and AC respectively such that DE∥ BC . If AD = 2.4 cm, AE = 3.2 cm, DE ∥ BC .](https://dwes9vv9u0550.cloudfront.net/images/4099150/27d555d5-d6a0-42b6-9da1-f65ba44a6e57.jpg)