C-08-Q220mediumsingle_mcq

If $YM,ZM$ are internal bisectors and $YN,ZN$ external bisectors of $\angle Y,\angle Z$ of a triangle, then $\angle MYZ + \angle NYZ$ equals—

a $45^{\circ}$
b $60^{\circ}$
c

ব্যাখ্যা

The internal and external bisectors of the same angle are always perpendicular to each other, since they bisect supplementary angles. Thus $\angle MYZ + \angle NYZ = 90^{\circ}$ .

220/231

এই অধ্যায়ের আরও প্রশ্ন

C-08-Q221With the same setup, equals—
C-08-Q222Again with the same setup, the four points are—
C-08-Q223In the sample MCQ, with centre and the given figure, the angle on the circumference standing on a central angl
C-08-Q224With for tangents and centre , equals—
C-08-Q225With the same configuration and the midpoint of arc , which of the following are correct? (i) , (ii) is FALSE
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C-08-Q227In the same setup, the foot of the perpendicular from to is—
C-08-Q228In a circle with centre and chord cm, if the perpendicular from has cm, then the radius equals—
C-08-Q229In a cyclic quadrilateral , if side is extended to a point so that an exterior angle is formed, then (i.e. the

90^{\circ}

9 0^{\circ}

180^{\circ}

C-08-Q230To find the centre of an arc drawn with radius cm, one draws perpendicular bisectors of two chords of the arc

Circle — সব প্রশ্ন দেখুন (231টি) →

If YM,ZMYM,ZMYM,ZM are internal bisectors and YN,ZNYN,ZNYN,ZN external bisectors of ∠Y,∠Z\angle Y,\angle Z∠Y,∠Z of a triangle, then ∠MYZ+∠NYZ\angle MYZ + \angle NYZ∠MYZ+∠NYZ equals—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

If $YM,ZM$ are internal bisectors and $YN,ZN$ external bisectors of $\angle Y,\angle Z$ of a triangle, then $\angle MYZ + \angle NYZ$ equals—