C-08-Q095: If an arc subtends an angle of $80^{\circ}$ at the centre, the angle s… | প্রশ্ন করি

C-08-Q095mediumsingle_mcq

If an arc subtends an angle of $80^{\circ}$ at the centre, the angle subtended at the circumference is—

By Theorem 20 the inscribed (circumference) angle is half the central angle on the same arc, so it equals $\dfrac{80^\circ}{2} = 40^\circ$ .

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এই অধ্যায়ের আরও প্রশ্ন

C-08-Q096If an inscribed angle is , the corresponding central angle is—
C-08-Q097In the proof of Theorem 20, the auxiliary line drawn through passes through—
C-08-Q098The proof uses the fact that an exterior angle of a triangle equals—
C-08-Q099In , implies because—
C-08-Q100Since , similarly equals—
C-08-Q101Adding the two relations gives
C-08-Q102The Work box accompanying Theorem 20 asks to prove the theorem when—
C-08-Q103The angle standing on an arc of the circle equals— the angle subtended by the arc at the centre.
C-08-Q104Angles in a circle standing on the same arc are—

C-08-Q105