Doha1 Doha1
  • 22-10-2016
  • Mathematics
contestada

∆ABC is a right angled at B and D is a point on BC if AD = 18cm BD = 9cm and CD =4cm Find AC

Respuesta :

SJ2006
SJ2006 SJ2006
  • 22-10-2016

In triangle, ABD,

AD²= AB²+BD²

AB² = AD²-BD²

AB² = 18²-9² = 324-81 = 243

AB = √243

In triangle, ABC,

AC² = AB²+BC²

AC² = (√243)²+(13)²

AC² = 243+169

AC = √412

AC = 20.29

Answer Link

Otras preguntas

The form of the poem "God's Grandeur" is that of A. an English sonnet. B. an Italian sonnet. C. a villanelle. D. blank verse.
35.4% expressed as a decimal becomes A. 354. B. 0.354. C. 35.0. D. 3.54.
Does anyone know the answer to this ? I need help , missing angles .
The owner of a dress shop ordered 33 dresses from a new designer. The designer's dresses now make up to 30% of all dresses in the shop. How many dreses are in
A sticker is 1.2 centimeters wide.How many stickers will fit edge on a strip of paper that is 108 centimeters long?
Answers to numbers 30,31,& 31
A failure of the red-sensitive nerves in the eye to respond to light properly causes A. astigmatism. B. farsightedness. C. chromatic aberration. D. color bl
Can you guys please tell me if what I answered for both are right?
if the root of a triad is d the 5th is the note
What is the greatest prime factor of 78?