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kodarae2501
15.07.2019 •
Mathematics
What is the measure of minor ark. df given that line de and line fe are tangent to o0(also if you knkw what does that o0 lookkng sign mean? )
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Ответ:
Option B is correct.
Step-by-step explanation:
Given:
Circle with center O.
line DE and line FE are tangents to the circle.
∠DEF = 84°
To find: measure of minor arc that ∠DOF.
Construction: Join DO and FO.
We know that Tangents are perpendicular to the radius at point of contact.
⇒ ∠EDO = ∠EFO = 90°
Now, In Quadrilateral ODEF
∠DEF + ∠EDO + ∠FDO + ∠DOF = 360° ( Angle Sum Property of Quadrilateral )
84° + 90° + 90° + ∠DOF = 360°
∠DOF = 360 - 264
∠DOF = 96°
Therefore, Option B is correct.
Ответ:
$104.1
Step-by-step explanation:
17.35 x 6 = 104.1
104.1 x 5 =520.5
520.5 x 2 = $104.1
Hope this helps!