Question

Which of the following is a true statement?



m∠a = m∠c + m∠d , m∠a = m∠b + m∠d
m∠a + m∠b = 90° , m∠a = m∠b + m∠c

Answer 1

can you find m∠b?

Answer 2

im not sure on how to do that.

Answer 3

you can find m∠b in terms of m∠c, m∠d, if you know the angle sum of a tringle ,



you can find m∠b in terms of angle m∠a if you know the angle sum of a straight line

Answer 4

*triangle

Answer 5

360

Answer 6

the sum of the angles in a triangle is 180°,

Answer 7

lol my bad -.- im always getting confused.

Answer 8

do you know the sum of angles on a straight line?

Answer 9

isnt that 180?

Answer 10

yes!

Answer 11

so can you form two equations which use this informations?

Answer 12

would you mind typing out the steps for me cause im still unsure on how to put it together?

Answer 13

using the angle sum of a triangle is 180°, we have

m∠b + m∠c + m∠d =180°

Answer 14

can you form the other equation?

Answer 15

Mmm not really..

Answer 16

m∠b + m∠a = . . .

Answer 17

is it m<a+m<b=90?

Answer 18

is that a yes?

Answer 19

its a no ,

Answer 20

90º is only half a straight line

Answer 21

-.- i feel so dumb w. this question already..

Answer 22

m<a+m<b=

Answer 23

my answer choices are m<a+m<b=90, m<a=m<c+m<d, m<a=m<b+m<d & m<a=m<b+m<c and the first and third are wrong..

Answer 24

m<a+m<b=180°

Answer 25

m∠b + m∠c + m∠d =180°

solve this equation for m∠b

by taking away m∠c + m∠d from both sides





m<a+m<b=180°

solve this equation for m∠b

by taking m∠a from both sides

Answer 26

what do you get??

Answer 27

ok where im confused is how is m<a+m<b=180?

Answer 28

all the way around is 360°
half way around is 180°