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Practical Geometry — MATHS STD 6 — Question

Gujarat BoardEnglish MediumSTD 6MATHSPractical Geometry1 Mark
MCQ
The number of obtuse angles in Fig. is:
  • A
    $2$
  • B
    $3$
  • ✓
    $4$
  • D
    $5$
✓

Answer

Correct option: C.
$4$
There are $4$ obtuse angles.
$1.\ 30^\circ + 65^\circ = 95^\circ $
$2.\ 30^\circ + 65^\circ + 45^\circ = 140^\circ $
$3.\ 65^\circ + 45^\circ = 110^\circ $
$4.\ 65^\circ + 45^\circ + 40^\circ = 150^\circ [$van obtuse angle is more than $90^\circ $ but less than $180^\circ ]$

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