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bill533:
@mhchen
mhchen:
|dw:1540229966272:dw|
In this picture, you see where the angle is a right-angle? That's because it's a perpendicular bisector.
Now can you find x with the help of this picture?
bill533:
yes
mhchen:
|dw:1540230494465:dw|
okay so what is x?
bill533:
90
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mhchen:
Yup.
mhchen:
|dw:1540230731669:dw|
Now. You know that all angles inside a triangle add up to 180 degrees right?
And based on the image, the top 2 angles are the same, since a bisector divides it into 2 equal parts.
If all the angles add up to 180, then
90 + 47 + y = 180.
Can you find y?
bill533:
i think so
bill533:
what else ?
bill533:
i can figure out the y
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mhchen:
well
90 + 47 + y = 180
137 + y = 180
right?
y = 180 - 137
mhchen:
understand so far?
bill533:
yes ma'am i do
bill533:
which makes it 43
bill533:
correct ?
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mhchen:
yeah
bill533:
thank you mhchen for your help on this i really do appreciate your tips and explanation it