nnsnsnnsns nnsnsnnsns

22-11-2017
Mathematics

contestada

Given: Triangles ABC and DBC are isosceles, m∠BDC = 30°, and m∠ABD = 155°. Find m∠ABC, m∠BAC, and m∠DBC.

Respuesta :

tynollette tynollette

22-11-2017

∠BDC=30, so ∠CBD + ∠BCD=180-30=150
ΔDBC is isosceles, so ∠CBD=∠BCD=half of 150=75
∠ABC=∠ABD-∠CBD=155-75=80
ΔABC is isosceles, so ∠ABC=∠ACB=80
∠BAC=180-80-80=20

Answer Link

Otras preguntas

please help will mark brainlist!!

Multiply. Write in simplest form. 3 1/4 x 2/3 2 1/6 x 1/4

What is 15% of 34, rounded to two decimal places?

I have 2 pencils. My sister has 5 pencils. What fraction of my sister's pencils are my pencils?

At Brazos Valley Natural Foods, 3 pounds of walnuts and 6 pounds of almonds sell for $51. Five pounds of walnuts and 4 pounds of almonds sell for $55. Find the

It takes a snail 10 seconds to move 1 centimeter.

solve by quadratic formula:3x^2+6x+1

Which best compares the particles of the substance when it IS In region 1 with the particles of the substance when it is in region 3? • The particles are slower

Which statement best summarizes the idea presented in the following passage (paragraph 3)? I have another objection; and that is, it is unjust that I should suf

Point B has coordinates (1,2). The x-coordinate of point A is -5. The distance between point A and point B is 10 units. What are the possible coordinates of