abolton04
21.05.2020 •
Mathematics
Answer this and get 50 points.
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Ответ:
I drew more points as uploaded picture.
We have, arc BD + 210 + 90 = 360 deg
(sum of all arcs on circle)
=> arc BD = 360 - 210 - 90 = 60 deg
Here we have angle CBD = (1/2) x arc CD = (1/2) x 90 = 45 deg
(property of angle on circle)
=> angle ABD = angle ABC - angle CBD = 180 - CBD = 180 - 45 = 135 deg
( A, B, C lie on same line => ABC = 180 deg)
Otherwise, we have:
angle BDA = (1/2) x arc BD = (1/2) x 60 = 30 deg
We have: x + angle BDA + angle ABD = 180 deg
(sum of all angles in a triangle)
=> x = 180 - angle BDA - angle ABD
=> x = 180 -135 - 30
=> x = 15 deg
Hope this helps!
:)
Ответ:
15°
Step-by-step explanation:
Angle in arc opposite x
360 - 210 - 90 = 60
Angle on the circumference = ½(60) = 30
Considering the triangle formed with the 90° arc
Exterior angle = 90 - (180-90)/2 = 45
Exterior angle = sum of interior angles
45 = 30 + x
x = 15
Ответ:
C- No Quincy should have used the trend line to find the corresponding x value when y=80
Step-by-step explanation:
i just did it