Mathematics, 08.04.2020 20:29 markleal57151
Lines BC and ED are parallel. They are intersected by transversal AE, in which point B lies between points and E. They are also intersected by transversal EC. Angle ABC measures 70 degrees. Angle CED measures 30 degrees.
Given: line BC is parallel to line ED
m∠ABC = 70°
m∠CED = 30°
Prove: m∠BEC = 40°
Statement Justification
line BC is parallel to line ED Given
m∠ABC = 70° Given
m∠CED = 30° Given
m∠ABC = m∠BED Corresponding Angles Theorem
m∠BEC + m∠CED = m∠BED Angle Addition Postulate
m∠BEC = 40° Subtraction Property of Equality
Which of the following accurately completes the missing statement and justification of the two-column proof?
m∠BEC + 30° =70°; Substitution Property of Equality
m∠BEC + 30° = 70°; Addition Property of Equality
m∠BEC + 40° = 70°; Substitution Property of Equality
m∠BEC + 40° = 70°; Addition Property of Equality
Answers: 2
Mathematics, 21.06.2019 13:30, love0000
The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).
Answers: 1
Mathematics, 21.06.2019 19:20, sierravick123owr441
Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?
Answers: 1
Lines BC and ED are parallel. They are intersected by transversal AE, in which point B lies between...
English, 01.12.2019 00:31
Social Studies, 01.12.2019 00:31
Arts, 01.12.2019 00:31
Mathematics, 01.12.2019 00:31
Mathematics, 01.12.2019 00:31
Mathematics, 01.12.2019 00:31
Mathematics, 01.12.2019 00:31