stephaniesayegh375 stephaniesayegh375
  • 01-04-2019
  • Mathematics
contestada

Lines AB and AC tangent to circle k(O) at B and C respectively. Find BC, if m∠OAB=30°, and AB=5 cm.

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 01-04-2019

Answer:

5 cm

Step-by-step explanation:

ΔABC is equilateral, so BC = AB = 5 cm.

____

AO is the perpendicular bisector of BC and the angle bisector of angle A, so ∠OAC = ∠OAB = 30°. Then vertex angle BAC of isosceles triangle ABC is 60°, which means all angles in the triangle are 60° and the triangle is equilateral.

Answer Link

Otras preguntas

The relationships of plants and animals to each other and their environment is what ecologists call _____.
is 1/3 bigger than 5/6
How would you find the real solution, by using the quadratic formula. x^2-4x+2=0
is it possible for an object not to be in motion and still have force acting upon it?
which element has an atom in the ground state with a total of three valence electrons
what is 40 percent as a decimal?
In Australia, most cattle ranching is found in
6/7 and 18/21 are the ratios equivalent.
In Australia, most cattle ranching is found in
what are the main colors of art?