GracioPYaemagc GracioPYaemagc

21-11-2016
Mathematics

contestada

ABC is a triangle in which angle B= 2 angle C. D is a point on BC such that AD bisects angle BAC and AB=CD. Prove that angle BAC=72°

Respuesta :

syed514 syed514

21-11-2016

so Triangle ABC and ADC are similar (two sides and one angle is equal)so angle CAD = angle ACB =cso angle BAC=2cand in triangle ABCangle BAC + angle ABC + angle ACB = 2c+2c+c = 5c = 180c=180/5 = 36angle BAC =2c=2*36 =72

Answer Link

Otras preguntas

Which equation has the same solution as 2x^2+x-3=0

how do you find the amount of 12 dogs decreased by 25%

suppose a person has a small intestine that has fewer villi than normal. would the person mostly be overweight or underweight? explain

how do movable pulleys make it easier to lift an object

How did the plebeians gain political rights

how did ancient civilizations contribute to the development of the eastern hemisphere

Sarah scored 68 out of 80 in a test.Write her score as a simplified fraction

In an amoeba, a small cavity within the cytoplasm that stores food is called a

what would happen to temperatures on earth the suns heat were distributed throughout the atmosphere

4 times a number is 64 what is the number