Question

(iv) ABCD is cyclic, angle B = 120° find measures of
angle D.​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$\huge \bf⇒solution$

ABCD is cyclic

Opposite Angles is of a Cyclic Quadrilateral is Supplementry.

Given □ABCD is cyclic and ∠B=110∘

In a cyclic quadrilateral the sum of opposite angles=180∘

⇒∠A+∠C=180∘

⇒∠B+∠D=180∘

⇒110∘ +∠D=180∘

⇒∠D=180∘ −110∘

⇒∠D=70∘

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More Information :-

WHAT IS CYCLIC?

Answer - A Cyclic Quadrilateral or Inscribed Quadrilateral is a Quadrilateral whose Vertices all lie on a Single Circle.

• The orthocenters of the same four triangles are the vertices of a quadrilateral congruent to ABCD, and the centroids in those four triangles are vertices of another cyclic quadrilateral.

• In a cyclic quadrilateral ABCD with circumcenter O, let P be the point where the diagonals AC and BD intersect.