Lachanceacale Lachanceacale

15-11-2015
Geography

Answered

in △ABC, D is a point on side AC¯¯¯¯¯¯¯¯ such that BD=DC and ∠BCD measures 70∘. What is the degree measure of ∠ADB?

Verified Answer :

gogochushij gogochushij

15-11-2015

BD=DC => △BCD is an isosceles triangle => ∠BCD=∠DBC=70°.
Sum of the degrees measures in a triangle = 180° =>
180=∠BCD+∠DBC+∠CDB;
180=70+70+∠BCD
∠BCD=40°

∠ADB and ∠BCD are adjacent =>
∠ADB+∠BCD=180
∠ADB+40=180
∠ADB=140°

Answer Link

Related Questions

How does Jingmei win the disagreement over the piano lessons

what documents do i need to get a passport

An ideal or perfect place especially in social political and moral aspects is called a satire b martyr c utopia d dystopia

What is the general term for bone projection

Read the poem The Purple Cow by Gelett Burgess The Purple Cow Reflections on a Mythic Beast Whos Quite Remarkable at Least I never saw a Purple Cow I never hope

what times what equals 125

una debilidad esexperiencia en los recursos humanos

The kashmir region is an area of conflict because ofA Minority ethic groups whishes to gain controlB Joint claims to territory by several countriesC A religious

a card is drawn from a wellshuffled pack of 52 playing cardfind the probability of getting red card a king a card of spades

music is written in two or more chords played simultaneously A Polytonal B Polyrhythmic C Polychoral D Polyphonic

Web Analytics