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

Some political theorists might argue that individual rights must, at times, be sacrificed to promote what?

Two objects attract each other gravitationally with a force of 3.0×10−10N when they are 0.45m apart. Their total mass is 4.0kg . find the individual masses

What letter comes next S,M,H,D,M

3902.00 divided by 3

Which words make up the adverb phrase in the sentence? Which words does the adverb phrase modify? Many early cities were built around forts. A. Many early; modi

Suppose there are 297 students going on a field trip. If each schoolbus can carry 58 students estimate the number of buses that will be needed to transport all

which synonym of the word look would be most effective in the following sentence

why would organisms break the bonds of organic compounds

For a fundraiser , Brad sold 2 less than 3 times the number of candy bars calls that Mary did . If they sold 334 total bars, find the number sold by each . Show

jamal earned $5.00 walking his neighbor's dog for one week. he was given a 1/5 of the $5.00 at the beginning of the week and 1/5 in the middle of the week. how