holacoma holacoma

04-03-2021
Mathematics

contestada

In circle O, chords AC and BD intersect at E. If MCD= 120 and MAB=100, what is BEC?

In circle O chords AC and BD intersect at E If MCD 120 and MAB100 what is BEC class=

Respuesta :

mhanifa mhanifa

04-03-2021

Answer:

D. 70°

Step-by-step explanation:

∠BEC is supplementary with ∠BEA

Find the measure of ∠BEA

m∠BEA = 1/2(mCD + mAB)
m∠BEA = 1/2(120° + 100°) = 110°

Supplementary angles sum to 180°

m∠BEC + m∠BEA = 180°
m∠BEC = 180° - 110° = 70°

Correct choice is D

Answer Link

Otras preguntas

this week is just one of 40 weeks you spend in your classroom this school year. convert the fraction 1/40 to decimal form

when you turn on a lamp electric energy changes to?

High-status occupations may have plenty of _______, but that does not necessarily mean that they either have great power or bring economic rewards.

Determine which ratio forms a proportion with 6/9

14) Regular aerobic activity improves the efficiency of the heart by? A. thinning the blood. B. strengthening the skeletal muscles. C. increasing the amount o

Round off 863 to one significant figure

A: Miguel says that you can easily separate numbers divisible by 2 into two equal parts. Do you agree? Why or why not? B: Manny says that if Miguel is correct,

1. What conditions are necessary for a hurricane to form? 2. On average, how many hurricanes form each year? 3. Which direction do hurricanes rotate? 4. What fa

A motorist traveled 311 miles on 12 gallons of gas. To the nearest tenth, how many miles can the motorist travel on one gallon of gas?

Which events in 1917 helped the United States decide to enter World War I?